Charles Tilly, the eminent Joseph L. Buttenwieser Professor of Social Science, passed away this morning. An official University-wide announcement is still in the works, though some of his students and colleagues have organized a vigil tonight at 7 p.m. that will take place under his Fayerweather office’s (514) window.

You can read more about Tilly and some of his work here. Although, if you’ve taken any courses in social science, it’s likely you’re already well-acquainted with his ideas.