This is a very optimistic view, but there are plenty of theories claiming otherwise. Check out the Fermi Paradox [1], or the Rare Earth Hypothesis [2] for a more detailed view on the problem.
To be honest the easiest explanation for the Fermi Paradox is that we are indeed alone as an inteligent civilization. If we were just an average civilization there should be plenty of evidence of more advanced civilizations across the galaxy, because probabilistically they would be millions of years more advanced than us.
To be honest the easiest explanation for the Fermi Paradox is that we are indeed alone as an inteligent civilization. If we were just an average civilization there should be plenty of evidence of more advanced civilizations across the galaxy, because probabilistically they would be millions of years more advanced than us.
[1] https://en.wikipedia.org/wiki/Fermi_paradox [2] https://en.wikipedia.org/wiki/Rare_Earth_hypothesis