Conversation so far:
Where was Sam Harris born?
Sam Harris was born in Los Angeles.
What did Sam Harris's parents do for a living?
Sam Harris was born the son of actor Berkeley Harris and TV producer Susan Harris.
Was Sam Harris family in any type of religion?
Sam Harris has stated that his upbringing was entirely secular and that his parents rarely discussed religion, though he was also not raised as an atheist.
Where did Sam Harris attend college?
Stanford University

Question: What was his major?
Self-contained rewrite: What was Sam Harris major?