content: If we’re right that there are 100,000 or more intelligent civilizations in our galaxy.  There are a few large assumptions made about some large numbers to come to this conclusion and when a few of them are of by a factor of 10 or 100 it could easily be 1-10 intelligent civilizations in our galaxy. If we ever discover life in our solar-system we could make better assumptions about some variables, but until we actually discover life outside our own system we can only speculate about the likelihood and abundance of life.