Can't be proven or disproven, that's the problem.  I PERSONALLY believe Regan accelerated the demise of communism in the USSR, but that's me.  More importantly, I think he acted as a buffer for its demise, meaning that it could have ended in a bigger 'boom' than it did.
I read a really interesting interview on economics (it touched on pretty much everything from that to race in America) with Thomas Sowell yesterday.  He's a senior fellow at Stanford, which is pretty cool...but what's interesting is that he's black AND conservative.  If you have the chance find a book by him and read it, it will change your life. 

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