A brief about comet C/2014 S3 and what are the odds that humans are the only technological species that has ever arisen in a given volume of space?

A brief about comet C/2014 S3 and what are the odds that humans are the only technological species that has ever arisen in a given volume of space?
Meteorites on Earth as well as the cratering on Moon, Mercury, Mars, and other bodies suggest that our solar system was born wild and stayed that way for a while.