Sylvester James Gates Jr. ’73, PhD ’77 has often described progress on diversity, equity, and inclusion as occurring at “blazingly glacial” rates. The reknowned theoretical physicist was the featured speaker for this year’s MIT Compton Lecture, and he spoke on Tuesday to an appreciative audience, gathered and masked, in Kresge Auditorium. During his address, he chronicled his 52-year career in research, teaching, and service. He also noted moments in history when progress toward advancing civil rights simultaneously surged forward and rolled back. “Those of us who read history are not…