Who are the most important, widely-read or influential living philosophers still actively working and contributing to the field today? Which thinkers are recognized for doing the most interesting and urgent work?
This is clearly subjective borderline territory so please try to justify your claim. As per the discussion it's probably not that important to limit yourself to one thinker per answer, but the best answers already justify their decisions based on a reasonable assessment of the importance of the new concepts the thinkers produced. It isn't necessary that the thinker be the most prolific, but she or he should probably rank fairly high in terms of number of citations (Gettier, for instance.) Thank you!