"In my experience evil usually wins unless good is very, very careful" Dr. McCoy on the original Star Trek, episode towards the end of season 3 when an alien pits good against evil to see which is stronger. These words always stuck with me, because evil corrupt Dems will stop at nothing to gain power while good people have morality and will not engage in such actions. This is why good has to very strong, and evil never stops until good people stop it.