Two things: 1) Check out "The Millennial Project": https://en.wikipedia.org/wiki/The_Millennial_Project:_Colonizing_the_Galaxy_in_Eight_Easy_Steps https://en.

Two things: 1) Check out "The Millennial Project": https://en.wikipedia.org/wiki/The_Millennial_Project:_Colonizing_the_Galaxy_in_Eight_Easy_Steps https://en.wikipedia.org/wiki/The_Millennial_Project:_Coloni... > The Millennial Project: Colonizing the Galaxy in Eight Easy Steps by Marshall T. Savage is a book (published in 1992 and reprinted in 1994 with an introduction by Arthur C. Clarke) in the field of exploratory engineering that gives a series of concrete stages the author believes will lead to interstellar colonization. Many specific scientific and engineering details are presented, as are numerous issues involved in space colonization. I find the cover image of a green galaxy is very inspiring! 2) Due to the nature of exponential growth, we will eventually feel a population crunch when reproduction overwhelms the rate of expansion. This is true even if we invent FTL ships. The crunch would be delayed (perhaps for millions or billions of years) but it is inevitable.