Ethan Siegel,SWaB!
Imagine what it would be like to come across an clever, alien species that found us and came to Earth. From War of the Worlds to Independence Day, and the overwhelming majority of alien depictions are of malevolence,violence, and the destruction of any galactic competitors. Whether they enslave us, or demolish us,or devour us, our fictional view of aliens shows them as hostile, and selfish,and with total disregard for humanity. From Elon Musk to David Brin to Stephen Hawking, many fine human minds fear precisely this fate. Yet there's no evidence at all that there's any malevolence to aliens. In...
Source: realclearscience.com