Someone said this on reddit:

Let me get this straight, Reagan was the greatest modern president, he turned the US into a debtor nation, cut social programs, supported Sadam, sold Iran thousands of missiles, armed and trained those who became the Taliban and Al Qaeda, and married religion with conservatism. There anything else?

The immediate response from some was, "Who won the Cold War?" Which was rebutted with:

Reagan was the beneficiary of defunct and bankrupt society that was on its way to folding regardless of who was in power. Reagan had no hand in the collapse of the USSR except to be someone who's ass was in the Presidential Chair at the time.

Sure, I'll accept that Reagan didn't have much to do about the Cold War if you accept the premise that Clinton didn't have much to do with the boom and prosperity of the 1990s. I've read reasonable articles both overstating and understating both Clinton and Reagan's impact. I think the answer on both these questions is probably, "we don't know."