This document summarizes key topics from an introduction to entrepreneurship theory lecture:
1) Entrepreneurship is discussed from different perspectives including opportunity recognition and value creation. No single accepted theory of entrepreneurship exists.
2) Major contributors to entrepreneurship theory are discussed, including Schumpeter's theory of creative destruction and Knight's view of entrepreneurs bearing uncertainty.
3) Core themes in entrepreneurship research are identified as uncertainty, innovation, opportunity recognition, and firm creation. Entrepreneurship draws from many fields without a unified theory.