Theodore Dalrymple puts forward an interesting hypothesis based on the British Journal of Psychiatry study that found that simply giving British inmates vitamins and dietary supplements decreased the occurrence of disciplinary action by 66% versus the control group.

The observation that Dalrymple buts forth with grantedly anecdotal evidence is that the destruction of family meals or simply parents cooking for children takes one of the major social fabric components out of growing up. As such, food becomes a lonely, secondary pursuit. If the British Journal of Psychiatry study is repeatable and correct, these two factors could account for a dramatic swath of criminal behavior.

Thanks to Volokh.com for the reference.