There were two opposing views of development in the 19th century. A push performance degradation is based on the second law of thermodynamics system, it argues that, due to the dissipation of energy, the world tends to be weak, the universe tends to "heat death", the structure of the retreat, disorder tend to the maximum, the whole world over time and the process of dying; Another is based on Darwin's theory of evolution of the evolution of the concept system, it points out that social evolution is the result of the increasing division of species, the evolution and increased, structure complex and orderly, and constantly reinforced by functional evolution, all nature and human society are to develop more advanced, more orderly organization structure. 2. Equality of shares, that is, each share of the same kind shall have equal rights; Suppliers who use the regular contribution plan will not borrow money from the bank of England until late February. When the programme ends, the rates offered may start to improve, but it will be a slow process. Keynes argued that savings and investment were two interdependent variables, not two independent variables.