Most of us know we are great. We easily see our own potential, goodness, and areas of skill. We're sure we have strong justifications for our behaviors and beliefs. When things go wrong for us, it usually isn't fundamentally our fault. When things go well, we know we deserve the credit. Just ask people. In a poll of high school seniors, only 2% thought they were below average in leadership ability, and 25% believed they were in the top 1% of ability to get along with others (note: this survey...