You're already familiar with the basic building blocks of ethics: values, norms, and moral dilemmas. We know ethics is about distinguishing between right and wrong conduct. But how do we actually do that? Going beyond simple definitions means looking at the machinery of ethical thought itself.

Ethical inquiry isn't a single activity. It happens on different levels. Think of it like a journalist's approach to a story. First, you report the facts. Then, you might write an opinion piece. Finally, you might question the very nature of journalism. Ethics works in a similar way, using three distinct lenses to examine moral questions.

The first lens is descriptive ethics. This is the work of an anthropologist or sociologist. It simply describes what a group of people or a society believes to be right or wrong, without making any judgment. It's about observing and reporting moral beliefs as they exist.

The second, normative ethics, is what most people think of as philosophy. It moves from observation to prescription. It asks what should be right and seeks to establish principles or norms for moral conduct. This is where we build arguments for why something is morally good or bad.

Finally, there's meta-ethics . This is the most abstract level. It doesn’t ask what is right, but rather what 'rightness' itself even means. It analyzes the language of morality, the nature of ethical properties, and where moral principles come from.

Most ethical reasoning happens at the normative level. To do it well, we need a set of guiding principles to ensure our thinking is clear and fair.

Solid ethical reasoning isn’t just about having strong feelings. It’s a structured process guided by core principles that prevent bias and sloppy thinking. Three of the most important are impartiality, consistency, and universality.

Impartiality demands that we treat everyone’s interests as equally important. In an ethical argument, the identity of the people involved shouldn't matter. A rule should apply just as much to your friend as it does to a stranger.

Consistency means our moral beliefs shouldn't contradict one another. If you believe that lying is always wrong, you must apply that belief in all situations, even when a lie might be convenient. If you find yourself making exceptions, you need to either revise your belief or provide a strong justification for the exception that doesn't rely on personal preference.

Universality is the idea that a moral principle must apply to everyone in a relevantly similar situation. If you argue that it's wrong for one person to steal food, you must also hold that it's wrong for anyone else to steal food under the same circumstances. This principle, closely associated with the philosopher Immanuel Kant , ensures that moral rules aren't arbitrary.

These principles of reasoning apply to beings we call moral agents . A moral agent is anyone who can be held responsible for their actions. To qualify, an individual generally needs the capacity for rational thought, the ability to understand moral principles, and the freedom to act on them. This is why we typically don't hold animals or very young children morally responsible in the same way we do adults.

When a moral agent acts, their decision can be examined. The process of defending that decision is called justification. A strong ethical argument provides clear, logical reasons for a particular moral judgment. It connects the facts of a situation to a relevant moral principle and shows how that principle leads to a specific conclusion.

For example, a simple ethical argument might look like this:

This structure provides a clear and defensible foundation for a moral position. By focusing on the principles of reasoning and the structure of arguments, we move from simply stating our beliefs to actively engaging in the practice of ethical inquiry.