You look at the world around you, and you take it apart into all its components. Then you take some of those components, throw them away, and plug in different ones, start it up and see what happens.

My old English buddy, John Rackham, wrote and told me what made science fiction different from all other kinds of literature - science fiction is written according to the science fiction method.

The big new development in my life is, when I turned 80, I decided I no longer have to do four pages a day. For me, it's like retiring.

I was thinking of writing a little foreword saying that history is, after all, based on people's recollections, which change with time.

Economic science concerns itself primarily with theoretical and empirical generalizations about the behavior of individuals, institutions, markets, and national economies. Most academic research falls in this category.

The gain is not the having of children; it is the discovery of love and how to be loving.

Comedy is very hard, but you have to learn the art and science of it.

I had always had a deep interest in social science, history. So even when I was in high school, I was debating, and in college debating, and interested in contemporary events.