Hereafter we shall be compelled to acknowledge that the only distinction between species and well-marked varieties is, that the latter are known, or believed to be connected at the present day by intermediate gradations whereas species were formerly thus connected.
Charles DarwinIt is absurd to talk of one animal being higher than another...we consider those, where the intellectual faculties most developed as the highest. - A bee doubtless would [use] ... instincts as a criteria.
Charles DarwinA fair result can be obtained only by fully stating and balancing the facts and arguments on both sides of each question." Charles Darwin
Charles DarwinThe most energetic workers I have encountered in my world travels are the vegetarian miners of Chile.
Charles DarwinExtinction has only separated groups: it has by no means made them; for if every form which has ever lived on this earth were suddenly to reappear, though it would be quite impossible to give definitions by which each group could be distinguished from other groups, as all would blend together by steps as fine as those between the finest existing varieties, nevertheless a natural classification, or at least a natural arrangement, would be possible.
Charles Darwin