HBO’s Into the Storm, dramatizing Winston Churchill’s leadership during World War II, deserves close study from our statesmen, their spouses, and anyone with questions about the stakes and requirements of warfare. This Churchill, portrayed brilliantly by Irish actor Brendan Gleeson, is an unapologetic conservative, a tenacious dynamo whose rhetoric and resolve protected Britain and the West from submission to tyranny. We pick up Churchill where HBO’s Emmy-winning 2002 film The Gathering Storm left off. Hitler appeaser Neville Chamberlain has been discredited, and Churchill takes over as prime minister. After the successful retreat of the British Army from Dunkirk, France, Churchill...