The difference in mind between man and the higher animals, great as it is, certainly is one of degree and not of kind.


The Descent of Man, and Selection in Relation to Sex, Part I, Chapter IV (p. 193), John Murray. 1901


The difference in mind between man and the higher animals, great as it is, certainly is one of degree and not of kind.

The difference in mind between man and the higher animals, great as it is, certainly is one of degree and not of kind.

The difference in mind between man and the higher animals, great as it is, certainly is one of degree and not of kind.

The difference in mind between man and the higher animals, great as it is, certainly is one of degree and not of kind.