the title of the first part of Sun Yat-sen's Plans for National Reconstruction, also known as Psychological Reconstruction

biological theory stating that germ plasm is the only hereditary material and is passed down continuously from generation to generation

Darwinism; the theory of evolution by natural selection as proposed by Charles Darwin.

Genetic theory proposed by German biologist August Weismann; it argues that heredity is based on the continuity of germ cells and that acquired traits cannot be passed to offspring.