David Baker studied under David Christian at Macquarie University, and completed the first Big History PhD in the world. He has taught Big History for several years at Macquarie and the University of Amsterdam, and designed new courses. His research specialties are complexity, Universal Darwinism, cultural evolution, and mathematical patterns in human history. He is writer of the Youtube series Crashcourse Big History, hosted by John and Hank Green. He is a curriculum writer for the Big History Project. David has published several scholarly articles on Big History, collaborated with leading physicists and biologists, has co-edited two scholarly collections, and is currently working on publishing his research as a book.