Evolutionary biologists have produced a solid body of evidence to explain patterns of diversification, both within and among species. Recent textbooks are weighted towards studies of animals, which is surprising given that plants are ideally suited for answering evolutionary questions. This book places the wealth of data that have been collected on plants into the unifying framework of game theory. It is the authors' hope that many students will take on this challenge and help the study of the evolutionary ecology of plants to develop as a mature, predictive science.