كولينجوود
Competition is often considered to be the opposite of cooperation, however in the real world, mixtures of cooperation and competition are the norm. In economies, as the philosopher R. G. Collingwood argued "the presence of these two opposites together is essential to an economic system. The parties to an economic action co-operate in competing, like two chess players". Optimal strategies to achieve goals are studied in the branch of mathematics known as game theory.