They can attack us

There is no need for aliens (if there are they) to attack people. It is a ridiculous idea and for some reason people really believe in it and they are worried with this fact and they are crazy about it. People have movies about aliens that come to this planet in order to kill people and to get them vanish and so on and so forth. For some reason people made up their minds about some creatures are possessed with an idea to attack them and to make them slaves. I guess of there are other living creatures in the universe and if they are powerful enough to slave this planet they would already do that. They would come to this planet and make us all slaves and it won’t take much tie of them. But, in case they still did nothing on this purpose then it means that it is more likely that those creatures never care about us just like we never care about birds and animals and we don’t need those as slave. I guess there are no other living creatures in this universe and even if there are they don’t really care about us.