WASHINGTON ― In 2009, the historian David Kaiser, then a professor at the Naval War College in Newport, Rhode Island, got a call from a guy named Steve Bannon. Bannon wanted to interview Kaiser for a documentary he was making based on the work of the generational theorists William Strauss and Neil Howe. Kaiser, an expert on Strauss and Howe, didn’t know Bannon from Adam, but he agreed to participa