A baby doesn't start looking like a baby until it's a week old. A species needs abstract intelligence before it can prey on its own kind. Bacteria and earthworms come first. There are no bad haircuts in cyberspace. Most legislators are incapable of eating breakfast without the help of several aides.
Aliens have terrible taste.
I don't want to alarm anybody, but there is an excellent chance that the Earth will be destroyed in the next several days. Alien beings have atomic blaster death cannons. God had created the universe for its theatrical content alone, simply in order to view the innumerable dramatic histories it generated. The philosophy of one century is the common sense of the next. For those who like this sort of thing, this is the sort of thing they like.