I'm the editor of Cato Unbound, and I've been a fan of Eliezer Yudkowsky's for several years. I'm fairly sure that I introduced Gene to his work as well.
There is no real story behind the article. There almost never is, with me. It's just my job to identify interesting and talented writers, and to pay them to write for us. He was overwhelmingly qualified. I asked, and he accepted.
Thanks for responding! Do you remember how you found EY in the first place?
Original at Washington Examiner
http://washingtonexaminer.com/down-with-politics/article/2508882#.UGSscI0iYZm
Repost at Reason.com
http://reason.com/archive/2012/09/25/why-politics-are-bad-for-us