Kant and the Categorical Imperative

Kant & Categorical Imperatives: Crash Course Philosophy #35

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Summary

This Crash Course episode introduces Immanuel Kant’s ethical philosophy as a secular alternative to morality based on God. Kant argues that morality comes from reason and applies universally to all rational beings. The video explains the difference between hypothetical imperatives, which depend on personal goals, and categorical imperatives, which are moral duties that apply regardless of desire. It then explores Kant’s two most famous formulations: the universalizability principle, which asks whether a rule could be consistently followed by everyone, and the humanity formulation, which says people must always be treated as ends in themselves, never merely as tools. The episode uses examples like stealing food, lying to protect someone, and deception in everyday life to show how Kant’s system works and why it can produce strict, sometimes counterintuitive conclusions.

Highlights

Kant separates moral duty from practical advice like “if you want X, do Y” 📚
The universalizability test asks whether your action could be a rule for everyone without contradiction 🔄
Stealing fails Kant’s test because it only works if some people get special exceptions 🥴
The liar-at-the-door example shows how Kant’s ethics can lead to tough, surprising conclusions 🚪
People have intrinsic worth because they are rational and autonomous agents ✨
Deceiving someone robs them of the ability to choose freely based on the truth 🎭
Kant’s second formulation says humanity should never be treated as a mere means 💡
The episode sets up utilitarianism as Kant’s big philosophical foil next time ⚖️

Key Takeaways

Morality, for Kant, comes from reason rather than religion 🧠
Hypothetical imperatives depend on what you want, while categorical imperatives apply no matter what 🎯
A moral rule has to be universalizable without contradiction 🌍
You must treat people as ends in themselves, not just as tools for your own goals 🤝
Kant thinks lying and deception are always wrong because they undermine autonomy 🚫

Overview

This episode kicks off with Kant’s big claim that ethics doesn’t need a divine source. Instead of grounding morality in God, he argues that human beings can discover moral truth through reason alone. That makes morality feel a lot more stable and universal, almost like a math fact rather than a religious preference.

From there, the video breaks down Kant’s distinction between hypothetical and categorical imperatives. Hypothetical imperatives are basically “if you want this, do that” rules, like getting a job if you want money. Categorical imperatives are different: they are moral commands that apply to everyone, whether we feel like following them or not.

The episode then explains Kant’s two famous formulations. First, the universalizability principle: only act on rules you could wish everyone to follow. Second, the humanity formulation: always respect people as ends in themselves. The video shows how these ideas make lying, stealing, and manipulation morally wrong, even when they seem useful or well-intentioned.

Chapters

00:00 - 02:30: From Divine Command to Moral Autonomy The chapter introduces a shift away from grounding ethics in God, contrasting Divine Command Theory and Natural Law with the view that morality can be understood through human reason alone. Immanuel Kant is presented as rejecting the close link between religion and morality, arguing that moral truths are universal and independent of faith.
02:30 - 05:00: Hypothetical vs. Categorical Imperatives Kant argues that morality can be determined by reason alone, without religion, and introduces the categorical imperative as the core test for right action. The first formulation, the universalizability principle, says to act only on a maxim that could be willed as a universal law without contradiction. The transcript explains this by defining a maxim as the rule behind an action and a universal law as something everyone would do in similar circumstances.
05:00 - 07:30: Universalizability: Testing Moral Rules Kant’s first categorical imperative is illustrated through a case where lying to protect Tony seems tempting, but is still morally impermissible because it violates universal moral law and can make the liar responsible for bad consequences. The example reinforces Kant’s view that even good intentions cannot justify breaking a moral rule like lying.
07:30 - 10:00: The Problem of Lying and Moral Absolutes Kant argues that while we often use other people to achieve our goals, this is acceptable only when we still respect their humanity and autonomy. Because rational agents can set their own ends, they have absolute moral worth and must never be manipulated or used as mere means. Lying is therefore always wrong, since deception prevents others from making informed, autonomous choices and violates the second categorical imperative. The chapter concludes by emphasizing that Kant believes moral truth is fixed and universal, setting up utilitarianism as a contrasting ethical theory in the next episode.
10:00 - 12:30: People as Ends, Not Mere Means This short segment is a closing acknowledgment, thanking the many people involved in the production, including the graphics team Thought Cafe. It reinforces the collaborative effort behind the work and recognizes contributors for their support and creativity.

Kant & Categorical Imperatives: Crash Course Philosophy #35 Transcription

Segment 1: 00:00 - 02:30 Crash Course Philosophy is brought to you by Squarespace. Squarespace: share your passion with the world. I don’t know if you’ve noticed this, but all of our discussions about ethics so far have had one thing in common: God. Divine Command Theory, for example, argues that what’s good, and what’s not, are determined by a deity, whether that’s the God of Abraham, or a panoply of gods who come up with ethical rules by committee. And the Theory of Natural Law, as advanced by Thomas Aquinas, says that morality comes from us but only because we were made by God, who preloaded us with moral sensibilities. But many other thinkers have argued that humanity’s moral code doesn’t come from some supernatural force. 18th century German philosopher Immanuel Kant, for one, thought religion and morality were a terrible pairing, and if anything, the two should be kept apart. Instead, Kant argued, in order to determine what’s right, you have to use reason. And a sense of consideration for other people. And – at least the way I’m teaching it today – chom-choms. [Theme Music] Kant took morality pretty seriously, and he thought we should, too – all of us – regardless of our religious beliefs, or lack thereof. Because, he knew that if we look to religion for our morality, we’re not all going to get the same answer. But he thought morality was a constant, in an almost mathematical sense. Two plus two equals four, whether you’re a Christian, Buddhist, or atheist. And for Kant, the same went for moral truths. But he made a distinction between the things we ought to do morally, and the things we ought to do for other, non-moral reasons. He pointed out that, most of the time, whether or not we ought to do something isn’t really a moral choice – instead, it’s just contingent on our desires. Like, if your desire is to get money, then you ought to get a job. If your desire is get an A in class, then you ought to study. Kant called these if-then statements hypothetical imperatives. They’re commands that you should follow if you want something.
Segment 2: 00:00 - 02:30 But hypothetical imperatives are about prudence, rather than morality. So, if you don’t want money, you can always choose not to work. And if you don’t care about getting a good grade, studying becomes totally optional! It’d be a terrible option, in my opinion as an educator, but still: optional. But Kant viewed morality not in terms of hypothetical imperatives, but through what he called categorical imperatives. These are commands you must follow, regardless of your desires. Categorical imperatives are our moral obligations, and Kant believed that they’re derived from pure reason. He said it didn’t matter whether you want to be moral or not – the moral law is binding on all of us.
Segment 3: 02:30 - 05:00 And he said you don’t need religion to determine what that law is, because what’s right and wrong is totally knowable just by using your intellect. OK, so how do you figure out what’s moral? Kant said the categorical imperative can be understood in terms of various formulations. Basically, different ways of phrasing or looking at the same essential idea. And he came up with four formulations of the categorical imperative. Let me tell you about the two most popular ones. The first formulation of the categorical imperative is often known as the universalizability principle. And Kant phrased it this way: “Act only according to that maxim which you can at the same time will that it should become a universal law without contradiction.” OK, Kant. Pretty wordy guy. So let’s unpack what he was saying. A maxim is just a rule or principle of action. And a universal law is something that must always be done in similar situations. So, as a Kantian, before I act, I would ask myself, what’s the maxim of my action? In other words, what’s the general rule that stands behind the particular action I’m considering? Let’s say you forgot your wallet in your dorm this morning. You don’t have time to go get it between classes, and you’re really hungry. You notice that the student working the snack kiosk in the union is engrossed in a conversation, and you could easily snag a banana and be on your way. Sorry. Chom-chom. I mean: chom-chom. You could easily swipe that chom-chom and be on your way. Is it ok, morally, for you to do this? Well, the particular action you’re considering – taking a chom-chom from a merchant without paying for it – is stealing. And if you approve the maxim of stealing – which you’re doing, whether you admit it or not – then what you’re actually doing is universalizing that action. You’re saying that everyone should always steal. If you should be able to do it, then – everyone should be able to do it. The thing is, this leads to a contradiction – and remember: Kant’s wording specifically says that moral actions cannot bring about contradictions.
Segment 4: 02:30 - 05:00 The contradiction here is: no one would say that everyone should steal all the time. Because, if everyone should always steal, then you should steal the chom-chom. And then I should steal it back from you, and then you should steal it back from me, and it would never end and no one would ever get to eat any chom choms. Therefore, stealing isn’t universalizable. So what Kant’s really saying is that it’s not fair to make exceptions for yourself. You don’t really think stealing is ok, and by imagining what it would be like to universalize it, that becomes clear. Now, Kant’s view that moral rules apply to everyone equally sounds nice and fair. But it can sometimes lead to some pretty counterintuitive results. To see how this formulation can go awry, let’s visit the Thought Bubble for some Flash Philosophy.
Segment 5: 05:00 - 07:30 Let’s say, one morning, Elvira and Tony are having breakfast. Then a stranger comes to the door and asks where Tony is, so he can kill him. Obviously, Elvira’s impulse is to lie, and say that Tony isn’t around right now in order to protect him from this would-be murderer. But Kant says that she can’t lie – not ever, not even to save Tony’s life. Here’s his reasoning: Suppose she’s at the front door, talking to the stranger. At the time, she thinks Tony’s in the kitchen, where she left him. But it turns out he was curious about the caller, so he followed her into the living room, and heard the stranger make his threats. Fearing for his life, Tony slipped out the back door. Meanwhile Elvira, in her desire to save him, tells the stranger that Tony isn’t there, even though she thinks he is. Based on her lie, the stranger leaves, and runs into Tony as he rounds the corner heading away from the house, and kills him. Had she told the truth, the stranger might have headed into the kitchen looking for Tony, which would have given Tony time to escape. But she didn’t. Now, by Kant’s reasoning, Elvira is responsible for Tony’s death, because her lie caused it. Had she told the truth, only the murderer would have been responsible for any deaths that might have occurred. Now, she could have refused to answer the stranger altogether, or tried to talk him out of it. But the one thing she is never permitted to do is violate the moral law, even if others are doing so, even for a really good cause. Poor Tony. Very sad. But thanks, Thought Bubble! So, the first formulation of the categorical imperative is about the universality of our actions. But the second formulation focuses on how we should treat other people. And it goes this way: “Act so that you treat humanity, whether in your own person or in that of another, always as an end, and never as a mere means.” Again, we have to define some terms here to figure out what this is all about. To use something as a “mere means” is to use it only for your own benefit, with no thought to the interests or benefit of the thing you’re using.
Segment 6: 05:00 - 07:30 Now, we use things as mere means all the time. I use this mug to hold my coffee, and if it would stop benefiting me – like if it got a crack in it and started leaking, I wouldn’t use it anymore. It’s perfectly fine to use things as mere means – but not humans. This is because we are what Kant called ends-in-ourselves. We are not mere objects that exist to be used by others. We’re our own ends. We’re rational and autonomous. We have the ability to set our own goals, and work toward them. Coffee mugs exist for coffee drinkers. Humans exist for themselves. So, to treat someone as an end-in-herself means to recognize the humanity of the person you’re encountering, to realize that she has goals, values, and interests of her own, and you must, morally, keep that in mind in your encounters with her.
Segment 7: 07:30 - 10:00 Now, Kant pointed out that we do use people, all the time, and that’s ok. Because, most of time time, we use other people as a means for something, but not as a mere means. We still recognize their humanity when we use them, and they agree to being used. So, for example, you are using me right now to get information about Kantian ethics. I am using Nick and Nicole to help me get that information to you. Kant said that you and I, and Nick and Nicole – we all we deserve to not be used as mere means, because of our autonomy. Unlike other things in the world, we’re self-governed. We’re able to set our own ends, to make our own free decisions based on our rational wills. We can set goals for ourselves, and take steps to realize those goals. This imbues us with an absolute moral worth, Kant said, which means that we shouldn’t be manipulated, or manipulate other autonomous agents for our own benefit. And this means that things like lying and deception are never OK. Because if I’m being deceived, I can’t make an autonomous decision about how to act, because my decision is based on false information. For instance, I might agree to loan you money so you can buy books for school, but I wouldn’t agree to loan you money so that you can get a new Xbox. I’m sorry, but no. So when you lie to me about what you’re gonna be doing with the money you’re asking for, you rob me of my ability to autonomously decide to help you. You’ve treated me as a mere means to accomplish your goals, with no thought to my own goals and interests. And that’s a violation of Kant’s second categorical imperative. So! Kant argued that proper, rational application of the categorical imperative will lead us to moral truth that is fixed and applicable to all moral agents. No God required. Of course, not everyone agreed with him. So next time we’re going to check out a theory that is in many ways the antithesis of Kantianism: utilitarianism. Today we learned about Kant’s ethics. We talked about hypothetical and categorical imperatives, the universalizability principle, autonomy, and what it means to treat people as ends-in-themselves, rather than as mere means.
Segment 8: 07:30 - 10:00 This episode of Crash Course Philosophy is made possible by Squarespace. Squarespace is a way to create a website, blog or online store for you and your ideas. Squarespace features a user-friendly interface, custom templates and 24/7 customer support. Try Squarespace at squarespace.com/crashcourse for a special offer. Squarespace: share your passion with the world. Crash Course Philosophy is produced in association with PBS Digital Studios. You can head over to their channel and check out a playlist of the latest episodes from shows like: Deep Look, First Person, and PBS Game Show. This episode of Crash Course was filmed in the Doctor Cheryl C. Kinney Crash Course Studio
Segment 9: 10:00 - 12:30 with the help of all of these awesome people and our equally fantastic graphics team is Thought Cafe.