Comment Re: I've always felt the great filter (Score 1) 315
No. The timescales are on the side of my argument. The diameter of the Milky Way is about 100,000 light years.
If just one alien civilization figured out how to travel at 1% the speed of light from Star to star, it would take about 10 million years to expand from one side of the galaxy to the other. That is a very small length of time, because if life is common enough for there to be, say, hundreds of civilizations developing in the galaxy, over its billions of years of history, then the spread of their beginnings would most likely vary by far more than just 10 million years.