This article is an initial attempt to illustrate how patterns of academic mobility in the history of universities have been framed by the international politics of particular time periods. The article briefly looks at "the medieval period" and then at the emergent colonial and nationalist periods, including the ways that institutions as well as academics themselves were mobile. More contemporaneously the powerful political forces of both the interwar period and the Cold War period (which are well known) are sketched. The final part of the article shows in some detail how, in the contemporary period, the scale and speed of cross-border academic mobility has changed. There are new actors and new ideologies. What is clear from the article is that there is not merely a need to keep information about the flows of academics up to date for policy purposes. It is also clear that we are a long way from being able to theorise the problem, sociologically and comparatively. (Contains 1 table.)