Since the 20th century, with the deepening of economic research and the expansion of economic activities in the world, the concept of capital has been used in different understandings. One is to continue to take capital as a class attribute concept in political economy to study the movement of capitalism. One is to take capital as a natural attribute concept in commodity economics, that is, a simple economic concept, to study the objective economic law that money produces more money. The latter is called the modern concept of capital.
According to the above text, the following 20th century concept of capital refers to?
Modern concepts of capital around the world