On Earth, it took something over half the available time for it to happen, and during that time, several events nearly rolled back complex life, so it doesn't s

On Earth, it took something over half the available time for it to happen, and during that time, several events nearly rolled back complex life, so it doesn't seem inevitable. In the universe as a whole, it would seem much more likely, unless you think the Fermi Paradox indicates that there's probably at least one difficulty that takes literally astronomical odds to surmount.