The human animal has evolved as a preeminently social animal.

Our only responsibility is to live our own life and take care of our own children.

Human life without death would be something other than human; consciousness of mortality gives rise to out deepest longings and greatest accomplishments.

The technological way of thinking has infected even ethics, which is supposed to be thinking about the good.

Cloning represents a very clear, powerful, and immediate example in which we are in danger of turning procreation into manufacture.

Genetics is crude, but neuroscience goes directly to work on the brain, and the mind follows.

My job is to provide the president with the richest possible consideration, so that he knows what is at stake in whatever decision he makes.