What&#x27;s interesting to me is less the question of violent crime trending with lead exposure (or abortion), but more the holistic view of society getting more liberal.<p>As violent crime goes down, as dangerous chemicals&#x2F;metals are removed from the environment, as the economy improves: all of these have an effect on the other (and I&#x27;m sure there are more). Clearly it would be difficult to create a study across all of those cohorts, but the point is that everything is improving, and with it the tendency for our society to be more accepting of differences.