ASSOCIATIVE CONCEPT LEARNING IN ANIMALS: ISSUES AND OPPORTUNITIES.
Though you stand on the top of the ladder of life, youmust not kick out that ladder from under your feet. You must not deny your relatives, the other animals. Their history is your history, and if you kick them to the bottom of the abyss, to the bottom of the abyss you go yourself. By them you stand or fall. What you repudiate in them you repudiate in yourself — a pretty spectacle, truly, of an exalted animal striving to disown the stuff of life out of which it is made, striving by use of the very reason that was developed by evolution to deny the possession of evolution that developed it. Thismay be good egotism, but it is not good science. (London, 1910, p. 508)