Who are the important intellectuals today, under the age of 55?

I do not mean public intellectuals, though they are an important category of their own.  For this question in earlier times you might have mentioned Foucault, Nozick, or Jon Elster.  They were public intellectuals of a sort, but they also carried considerable academic heft in their own right.  They promoted ideas original to them.

So who today are the equivalents?  Important, original thinkers.  With impact.  You look forward to their next book or proclamation.  Under age 55.  Bitte.