Although other primates have the mental power to exhibit some rudimentary etiquette at dinner, their self-control is still quite puny by human standards. Experts surmise that the smartest nonhuman primates can mentally project perhaps twenty minutes into the future—long enough to let the alpha male eat, but not long enough for much planning beyond dinner. (Some animals, like squirrels, instinctively bury food and retrieve it later, but these are programmed behaviors, not conscious savings plans.)
