Philosophical inquiries in a particular field sometimes simply fade out. Interest shifts to new problems, the old problems come to seem intractable, philosophical curiosity does not survive the detailed work a glimpse of the solution discloses as necessary, or one finds that there is nothing new to say, that one can no longer be creative about the issues involved. But sometimes the loose ends are recognized and someone attempts to tie them up together and bring the inquiries to a more or less satisfactory conclusion. John Bishop has done this in his book about agency.