Part 2 of 3. What makes you the same person as the little kid growing up a number of years ago? Is the identity of a person tied to the persistence of a body or a soul or something else entirely? Can we even give any explanation at all of the persistence of a person? Michael Della Rocca (Yale University) explores some of the puzzles and problems of personal identity that arise from the revolutionary work of the philosopher John Locke. [13:06]