Not my point; I did say "most". While I should have added "much of the time", my point still stands - I would be willing to wager my income for the next five years that the majority of "bad", illegal or downright evil acts for which people refuse to indulge the impulse are avoided not out of moral/ethical principle but out of fear of punishment. The human being is not an inherently moral or ethical creature - those are constructs provided us by civilization. Some we recognize as a good thing and absorb wholeheartedly, while the rest we adopt as a matter of practicality (i.e., to avoid society's punishment).
In short, that "line" that most people won't cross is most likely NOT at as high an altitude that they would have the rest of us believe... or would have THEMSELVES believe.
I agree, and would add that the idea of "punishment" is far wider than any overt action by an authority figure.
- I didn't ask her out because I'm afraid it would change our relationship.
- I can't be open with my homosexuality because it would hurt my Parents feelings.
- I didn't eat that cheeto because I wanted my coworkers to think I'm health conscious.
- I didn't bring up politics/religion/free-will in that conversation because I didn't want to touch off a huge debate that solves nothing and just pisses-off all parties involved.
It's not the reason for every decision, but fear of punishment/rejection/social-censure affects most people far more than they'd probably like to admit.