What is the difference between good and evil? Please give me a short reply of about 100 words.
There are many philosophical discussions on good and evil, but I'll stick to the biological versions:

* Good closely matches altruism, or helping others around you. If a society was filled with good people, more individuals in it would survive at the cost of the highest performers losing out some.
* Evil is selfishness, or prioritizing self above others. If a society was filled with evil people, more individuals would die off so the highest performers could thrive

Different environments may select for different levels of altruism: Bonobos have abundant food but are predated on by leopards and express altruism, chimpanzees need to fight more for food and are also predated on by leopards and express less altruism.