Given the vast number of stars and the number with planetary systems, I have little doubt that there is life on other worlds. But how much of that life is capable of technological societies is an unanswered question for which we have 0 evidence. And if Special Relativity continues to stand up to experimental scrutiny, it is possible we will, and can, never know. The speed of light, fast as it is, is one hell of a barrier to communication between systems, esp. once you get into hundreds or thousands of light years distance.