For me, this is a bit of a suspicious explanation, because Europe is a patchwork of abortion laws, with some countries being traditionally strictly religious an

For me, this is a bit of a suspicious explanation, because Europe is a patchwork of abortion laws, with some countries being traditionally strictly religious and other less so, but the crime stats don't copy that. Communist Romania once banned even contraceptives, and yet it never became a violent crime haven, not even after Communism fell. (Which was some 25 years after the ban, so the unwanted kids should still have been in their prime criminal age.) Maybe the correlation isn't causational, maybe it only works in specific demographic groups...