Reagan was an intellectually shallow man from a poor New Deal Democrat family who idolized FDR as a young man, led a student strike in college when his cash-strapped school (Eureka College in Illinois) tried to cut classes and professors during the Depression, and then seamlessly turned into a right-wing Communist witch-hunter in Hollywood, partly due to his own growing wealth making him greedy, partly due to the wealthy right-wing friends he made in Southern California, and partly under the tutelage of his second wife, actress Nancy, who was very conservative and materialistic.
Reagan was racist, a typical Religious Right hypocrite who cozied up to the likes of Jesse Helms and Jerry Falwell while doing what he pleased in private, and he turned his back on nearly everything he believed in as a young man as he grew older and became a spokesman for rich white Californians and corporate interests like GE. What made him different was that, thanks to his career as an actor, he was much more charming and smooth and graceful than your average Republican pol like Nixon or the elder Bush. And he was perfectly comfortable in front of a TV or movie camera, unlike most of his contemporaries like Nixon or Carter or Ford. We're still dealing with the damage he's caused the country to this day.