Astronomers say Universe is small and finite.
Well if that was the case, a universe with 56 Billion light years of lenght "only", there would be higher chances that we are alone in the universe (although i can't really picture what 56 billion light years must mean in terms of size). If the theory that says that after the singularity kicks in we are going to "own" the universe is true, then the answer to the paradox of why no alien race has already done it would be that we are indeed the first ones to get to such a developed stage.
Although 56 billion light years is a lot of space for intelligent species to come to existence, maybe and probably it is indeed very very hard for intelligent species such as ours to exist in "only" 56 billion light years of lenght. Either that, or the singularity as some of us envision it isn't true. Or it's just that this theory of the doughnut-shaped universe is sham.