Comment by NortySpock

> Where do people find their moral and ethical compass?

I agree that atheists cannot point to a single book that everyone should use to define their moral and ethical compass, but I do think that utilitarianism (either act-based: "we should act always so as to produce the greatest good for the greatest number" or rule based: "we ought to live by rules that, in general, are likely to lead to the greatest good for the greatest number") provides a healthy starting framework.

Utilitarianism: Crash Course Philosophy #36 (10 min) https://www.youtube.com/watch?v=-a739VjqdSI