It takes many years and a lot of hard work to earn a doctorate in history. But it all started with an undergraduate degree. Many current PhDs got their start at the schools listed here.
Source: Weighted Baccalaureate Origins Study, Higher Education Data Sharing Consortium. The study tracked baccalaureate origins of individuals granted PhDs from 1992-2001. The listing shows the top 10 institutions ranked by percentage of undergraduates who went on to earn a PhD in the selected discipline.