According to the late Dr. Stephen Hawking and a number of other thinkers, one of the reasons why we can't seem to detect a signal from an alien society is because marauding species are on a mission to destroy any advanced life in a quest to eliminate any possible competitors for cosmic resources and potential enemies before they have the technology and weapons to defeat them. But given the vastness of space, the abundance of resources in it, and the rarity of spacefaring intelligent life, does this idea actually make sense?