He was a human relations specialist who made americans feel good about their conservative thoughts like racism, colonialism..He was a militarist. He started the biggest militarist push of USA history,apart from real war times, inside a strategic defense program called SDI.
Cold war was bad and its his succes to make it end.But he did it with moving forward on his militarist direction.His approach to the weapon reduction discussions with Soviet Union,was very unwilling and careful. So the way he ended the cold war,created the base of post cold war conflicts.