A Simple Ethics Model

Epistemic status: Medium confidence, not surprised if I'm missing something important

Hi! This is probably the last post of mine you’ll read on WordPress, I’m halfway done moving this blog over to a personal site. Subscriptions should transfer over cleanly.

Disclaimer #1: I am probably reinventing the wheel. However, reinventing the wheel is good.

Disclaimer #2: This post probably fundamentally misunderstands non-consequentialists.

I’ve been thinking about normative ethics lately. There are three major schools. Consequentialism, deontology (“rule-based morality”), and virtue ethics. These are typically said to be in opposition, but I think it’s simple for consequentialism to subsume the other two. Let me know if you find this framework helpful, or if it’s missing something important.


Consequentialism at its simplest looks like this: perform the action that achieves the best consequences.

Unfortunately, predicting consequences is really hard. It’s even harder to predict nth-order consequences. We often default to only considering immediate consequences because they’re easier to calculate and predict. However, long-term consequences are typically much more important. Thus, approaching decisions as though we can calculate the best consequences will often lead to worse decisions.

Not only that, we have complicated values we attempt to satisfy. While calculating is great when values are relatively simply (QALYs), it’s often infeasible within our common constraints (especially time: “Do you want this job or not?”)

So even though we’re consequentialists, it’s hard to function consequentially. This isn’t a blow to consequentialism though, it’s a sign that our model of human decision-making is missing something.


The alternative to brute calculation is the use of rules or heuristics. Not eating meat is simpler (meaning: easier, faster, and cheaper) than calculating the negative utility of each meal and finding the equilibrium between personal pleasure and animal suffering.

Rules also have the benefit of counteracting biases and poor calculation capability. For example, people make worse decisions while drunk. Having a rule like “I never drive drunk” routes around the risk of calculating utility badly.

When time and processing power permit, calculations allow for superior decisions. When they don’t permit, rules allow for superior decisions.


Where do virtue ethics come in? Consider virtues like courage, humility, and temperance. These are habits of action. They’re important for three reasons:

  • The decision-making machine in your head, the one that calculates or checks rules, only delivers knowledge of your preferred action. Whether it’s delivered quickly or slowly, it’s still only knowledge. Execution remains. Execution can be hampered by outside factors like fatigue, resentment, or fear. Virtues are those habits that allow us to execute ethical decision-making in spite of those factors.
  • We think about rules when we don’t have minutes to calculate. But sometimes we don’t even have seconds to think about rules. Our habits kick in before we have time to access our decision-making. A virtue is whatever habit lends itself to better responses–this includes things like reacting instantly to cruelty (before timidity can set in) or reacting humbly to praise (before scheming can set in).
  • Even thinking to apply rules or to calculate is a habit. It takes wisdom to think.


The ethical process is two-fold:

  • Develop toward superior values
  • Act toward achieving those values

I think that using this framework helps me with #2 in a few ways.

Firstly, by categorizing different approaches, it helps me choose between rules and calculations. Sometimes I apply rules when I could be calculating (to better ends). Keeping in mind that calculations are sometimes an option will improve my decision-making. I think this is a far more common failure mode than the alternative, choosing to calculate when heuristics would be superior.

Secondly, it helps me figure out the point of virtue. Why should those of us who want to do the most good we can do think about virtue? Because there will be moments in our lives when we can do significant good and it will come down to habits instead of careful decisions.

Thirdly, in the past I’ve gotten hung up on how to achieve my values. Should I just focus on being a good person? Should I follow good heuristics? Should I always do what seems to have the best consequences? In practice, I, like everybody, use all three methods, and have worried that this means I’m being inconsistent (which I’m sure I am in other ways!). It doesn’t though. They’re just different components of the same ethical machine.