The only useful thing I know that Reagan did was to negotiate with Gorbachov the ways that would lead to the fall of comunisme in URSS. But it was Gorbachov who had the work, it was his own country.
Of what I know about him (some searches on google):
Over two terms, from 1981 to 1989, Reagan reshaped the Republican Party in his conservative image, fixed his eye on the demise of the Soviet Union and Eastern European communism and tripled the national debt to $3 trillion in his singleminded competition with the other superpower.
Singleminded competition. Not good.
Tripled the national debt to $3 trillion? Unless my english sucks too much to understand that, it's not good.
Dealing skillfully with Congress, Reagan obtained legislation to stimulate economic growth, curb inflation, increase employment, and strengthen national defense. He embarked upon a course of cutting taxes and Government expenditures, refusing to deviate from it when the strengthening of defense forces led to a large deficit.
So, he was a military sir. In the times of the Cold War, one could understand, but it led to a large deficit. How smart is that?
Well, I don't know much about him, either because I'm not American, and because I was too young when he was president.