I also wondered why the article ignored the "Freakonomics" factor - i.e. a carefully researched thesis that access to abortion was a major factor in the crime drop, and far more significant than police tactics.  I do wish the author had taken a biostatistics course, where he would have le...

Hear, hear! Good points all..... This is not an issue of absolute certainty, but rather one of risk mitigation. What irks me so much about global warming deniers who use the permanent portfolio is that they see the need for risk mitigation in their investment decisions based on the notion that one ...

I'm now convinced it always takes 30-40 years of concerted effort to change society.  It took just as long for the civil rights movement to end Jim Crow, etc..  And just as long for the Abolitionists to reach their endgame with the Civil War. Why would this be so?  Does it take that long for the ol...