Ronald Reagan was a polarizing political figure. To his supporters, he was a giant—a US president who won the cold war, ended an era of big government, and filled the nation with a sense of purpose. To his critics, he was a dolt—an old guy who coddled tinhorn dictators while allowing both the US deficit and income inequality to explode. Hmm. Not much middle ground there. But we’ve now had decades to look back on the Reagan era. Sunday, Feb. 6, will be the centenary of his birth. How good a president was the Gipper, really? Looking at it from today, can we get any sense of how he rates in history?