Simple question. Loaded question. Looking for honest, insightful answers. Is the world getting better or worse?

We've all laughed at the Vidal Sassoon commercials showing the caged monkeys having shampoo shoved into their eyes with Q-tips, but did you know that those monkeys never got paid for that commercial? So, I know that they test hair-care products and certain vaccines on animals. But, what about anti-depressants. How do you know if an animal is depressed or not, or schizophrenic? And then judging whether or not they got better?