My guess is that life will be fairly common in the universe, but almost all of that life will be of the single celled variety. Just look at the history of life on Earth - for 2.9 billion of the 3.5 billion years that life has existed, that's what it was. Getting over the hump of becoming multicellular is a huge barrier. For most of the remaining 600 million years, life was of the non-intelligent sort. There is no reason to think that it's inevitable. Civilizations are probably extremely rare in the universe, let alone civilizations that don't destroy themselves soon after becoming intelligent.