Kevin Drum, whose article in the current Mother Jones seems to have put lead back on the policy agenda, responds to comments. Short version: the evidence is solid, but yes, we need more science and a real benefit-cost analysis. (I’m pretty sure that a thorough analysis would show huge net benefits, but that analysis hasn’t been done yet.)
Kevin, having done much more work on the issue than the typical advocate, is much less dogmatic about his conclusions. Too bad cloning is illegal: with about a dozen Kevin Drums, we could move this country forward.