thinking is social; it occurs not only in specific situations, but in a given cultural milieu. The individual is as much a product of society as society is a product of the individual; a vast network of customs, manners, conventions, language, and traditional ideas lies ready to pounce upon every new-born child, to mould it into the image of the people among whom it has appeared. So rapid and thorough is the operation of this social heredity that it is often mistaken for physical or biological heredity.
