Adam Smith is considered the founder of trade theory for proposing the theory of absolute cost advantage to explain the basis of foreign trade. His idea that countries will specialize in producing goods they have an absolute advantage in was an early pioneering study of how economies of scale can influence trade patterns. Smith's concepts like the division of labor and inventions by workers still have undeniable influence on trade theory today. The theory posits that two countries will trade if one can produce a good with absolutely lower costs than the other, and will each specialize in producing the good they have this advantage in order to increase total output.