Besides love and sympathy, animals exhibit other qualities connected with the social instincts which in us would be called moral.
Charles DarwinI have watched how steadily the general feeling, as shown at elections, has been rising against Slavery. What a proud thing for England if she is the first European nation which utterly abolishes it! I was told before leaving England that after living in slave countries all my opinions would be altered; the only alteration I am aware of is forming a much higher estimate of the negro character.
Charles Darwin