It's not about whether they can think of! Or whether they can speak! It is purely and solely a question of whether they can suffer!
Jeremy Bentham ; ; The animal face today are more or less all the nations of barbarians. It is untrue and grotesque when their supposed high culture at every opportunity to emphasize and celebrate this day after day the most horrible atrocities against millions of defenseless creatures or permit but indifferent. Cruelty against animals, neither in education nor true are true learning. It is one of the most characteristic vices of a low and ignoble people.
Alexander von Humboldt 
