“If people lived forever—if they never got any older—if they could just go on living in this world, never dying, always healthy—do you think they’d bother to think hard about things, the way were doing now? I mean, we think about its everything, more or less—philosophy, psychology, logic. Religion. Literature. I kinda think, if there were no such thing as death, the complicated thoughts and ideas like that would never come into the world.”