Destruction of Worlds

Across the Universe, astronomers know of but a few asteroid belts with the limited telescopes we have. For the ones we do know about, they are much like our own solar system, and potential locations that may hold life. A basic assumption is that asteroid belts formed during the accretion of matter when a solar system is born, but is this true? What are asteroid belts, and is it truly the case they all formed naturally, or perhaps they used to be planets? What if these were once inhabited planets? In this remote viewing exploration, this is the question along with the stark realization that humans just may the children of wars across this Universe.