Why no-growth economics? - The answer in a few sentences
Zero-growth theory is the most scientific form of economics - mathematical economics (Georgescu-Roegen) as developed by ecological economics (Daly and Costanza: energy economics, and economics that takes ecology seriously). The basic point is this: the economy is a subset of the ecological system, not vice versa. Endless economic growth is a fantasy in a finite system. And we face the gradual decline of low entropy energy and materials into high entropy wastes, which is a very real limit that physics imposes on economics.