The obvious (not necessarily correct) answer is religion and community enforcement of norms. No idea if this is empirically defensible; maybe you'd need to comp

The obvious (not necessarily correct) answer is religion and community enforcement of norms. No idea if this is empirically defensible; maybe you'd need to compare north vs. south (and control for about a thousand other variables) to disaggregate the root causes from the noise. I also wouldn't say that intimate partner crime, etc. has "no plausible economic motive"; the rich have far more to lose from a stint in prison, and so might be far less likely to commit these crimes. The "economic motive" is that impulse control prevents economic loss. This (again conjectural) thesis dovetails with the idea above; if it's not economic losses that scare you straight, it might be community/church pressure that does so.