At the beginning of his administration, Obama homed right in on Medicare, which he wanted to fix by reducing the overall cost of health care in this country. He risked everything – some would claim he lost everything – by being so single-minded.

Running the company for the shareholders often reduces its long-term growth potential.

Military operations alone cannot defeat an insurgency because only economic development and political action can address most sources of disaffection. If military operations are not conducted consistent with political objectives or occur without economic development, they are certain to alienate the population further, reduce the amount of intelligence available to […] security forces, and strengthen rather than weaken the enemy.

Cannibalism is a Western, white imposition. A retrospective racism. Tribal memory, collective dreams and wishful thinking should, if not silence, then at least reduce to a tearful academic whisper any attempt to discredit the lives of Indians. Haven’t they suffered enough?

Moments ago, the U.S. Senate decided to do the unthinkable about gun violence – nothing at all. Over two years ago, when I was shot point-blank in the head, the U.S. Senate chose to do nothing. Four months ago, 20 first-graders lost their lives in a brutal attack on their school, and the U.S. Senate chose to do nothing. It’s clear to me that if members of the U.S. Senate refuse to change the laws to reduce gun violence, then we need to change the members of the U.S. Senate.

Reduction ad absurdum, which Euclid loved so much, is one of a mathematician’s finest weapons. It is a far finer gambit than any chess play: a chess player may offer the sacrifice of a pawn or even a piece, but a mathematician offers the game.