If we look at the history of humans, we have not become more peaceful over time. We have become more violent and developed the capacity to blow the whole world to bits.
Just 2000 years ago there were wars but there were no smart weapons of mass destruction as now. As we have evolved we have become better at war, so why do people think that just because aliens have technology to travel between stars they will necessarily be peaceful?
Just 2000 years ago there were wars but there were no smart weapons of mass destruction as now. As we have evolved we have become better at war, so why do people think that just because aliens have technology to travel between stars they will necessarily be peaceful?