Alan Guth

The recent developments in cosmology strongly suggest that the universe may be the ultimate free lunch.

It’s hard to build models of inflation that don't lead to a multiverse. It’s not impossible, so I think there’s still certainly research that needs to be done. But most models of inflation do lead to a multiverse, and evidence for inflation will be pushing us in the direction of taking [the idea of a] multiverse seriously.

It's actually safe to create a universe in your basement.