My founding debt is to Bert Dreyfus, who brought Heidegger to life for me when I was his graduate student at Berkeley. He is also the first cause of my second debt, to the meetings at Asilomar held every summer by (mainly) his former students and influencees. Here I profited from friendly interaction with the many regular attenders of these meetings, too many to name; my great debts to their individual writing are shown in this book. I am further grateful to those who read and gave valuable reactions to drafts: Jeff Sebo, Tito Magri, Paul Lodge, and (especially) Lee Braver.