One of the most startling events in my life was when my older son was about 16, and he blamed me for all the troubles of the world. So I, I felt like telling him, Oh no, I was just like you when I was your age; I wanted to change the world, too.

The president has very little effect on the economy. If you want to put blame or credit, the main person who influences the business cycle is the head of the Federal Reserve Bank.

Centuries ago it may have been difficult for pregnant women and their children to get proper nourishment, probably leading to smaller - and therefore shorter-lived - adults.

In 1890, nearly everyone died on the job, and if they lived long enough not to die on the job, the average age of retirement was 85.

One of the most startling events in my life was when my older son was about 16, and he blamed me for all the troubles of the world. So I, I felt like telling him, Oh no, I was just like you when I was your age; I wanted to change the world, too.

In most, if not quite all, parts of the world, the size, shape and longevity of the human body have changed more substantially, and much more rapidly, during the past three centuries than over many previous millennia.

The older I get, the more important my view of the family is.