Dear Dr B: Can you think of a single advancement in theoretical physics, other than speculation, since the early 1980's?

This question was asked by Steve Coyler, who was a frequent commenter on this blog before facebook ate him up. His full question is:


�Can you think of a single advancement in theoretical physics, other than speculation like Strings and Loops and Safe Gravity and Twistors, and confirming things like the Higgs Boson and pentaquarks at the LHC, since Politizer and Wilczek and Gross (and Coleman)