Vol. I: The Colonial Period. Charles Austin Beard was the most influential American historian of the early 20th century. He published hundreds of monographs, textbooks and interpretive studies in both history and political science. He graduated from DePauw University in 1898, where he met and eventually married Mary Ritter Beard, one of the founders of the first Greek-letter society for women, Kappa Alpha Theta. Many of his books were written in collaboration with his wife, whose own interes ...