Professor Al Bartlett begins his one-hour talk with the statement, “The greatest shortcoming of the human race is our inability to understand the exponential function.” He then gives a basic introduction to the arithmetic of steady growth, including an explanation of the concept of *doubling time*. He explains the impact of unending steady growth on the population of Boulder, of Colorado, and of the world. He then examines the consequences steady growth in a finite environment and observes this growth as applied to fossil fuel consumption, the lifetimes of which are much shorter than the optimistic figures most often quoted. See also: Legend of the chessboard (IBM’s Mathematics Peepshow).