It is an important fact to grasp that many of the aspects of the universe which appear so obviously in conflict with any interpretation of the universe as hospitable for life, turn out to be crucial features that are necessary for a universe to support complexity of any known sort.We shouldn’t be surprised to find that the universe is so big because that appears to be the only kind of universe we could in principle observe. Furthermore we should not be surprised not to observe extra-terrestrials as the distances involved are so vast. Universes that meet the necessary conditions for life are big and old, dark and cold. ‘All the worlds a stage’ as Shakespeare would say, and it has to be an unimaginably big one to have any players on it.