It is a common belief that mental illness runs in families. While it is true that heredity plays a role, in reality, the vast majority of cases—such as schizophrenia, bipolar disorder, depression, and ...

IN a paper recently presented before the Eugenics Society, Dr. David Forsyth returns to that interminable argument ‘Heredity versus Environment’. By him, heredity is taken to imply transmission from ...

IN some branches of biology the relevant data can be pieced together without the aid of any very comprehensive conception of the structure or potentialities of the living organism. The study of animal ...