TIME Cover: Optimism

TIME‘s  cover this week: The Science of Optimism
HOPE ISN’T RATIONAL–SO WHY ARE HUMANS WIRED FOR IT?

Inside: TIME’S White House Correspondent Michael Scherer reports from inside Obama’s Chicago Campaign HQ: Interviews with David Plouffe and David Axeldrod. Plouffe says: “I can’t tell you what a gift, if we use it properly, this year is. If we don’t, shame on us.” Read the full story here.