First Step, return to Moon and establish a permanent presence by July 20, 2019.
Second Step, by 2030 establish O'Neil factories at LaGrange points to process lunar material and asteroidal material into Solar Power Generating stations so that all power for earth will come from space based power plants.
Third Step, by 2050 all heavy industry is moved off planet and Earth becomes a bedroom community where all God's children can live in a pastoral paradise of our own making.
Remember, our economic system recognizes the old adage, "infinite wants, limited resources". If you look up, (or as we say "Ad Astra"), there is no limit to the resources available.
Climbing down off soapbox!