US oil peaked in 1970, as M. King Hubbert predicted in 1956.  Coal peaked in the US (in terms of BTUs) in 1999.  In Pennsylvania it peaked in 1920.  Uranium mining peaked in the US in 1980, the only "inexhaustible" nuclear is from the Sun, not using reactors to boil water (and make lethal legacies for all future generations).  Peak grain per capita worldwide was in the mid 1980s.  We are far beyond the carrying capacity of the biosphere by any definition.  Fresh water in decline.  Deserts expanding.  Forests cut down.  Fisheries being depleted.  There are ways to reverse these problems but they would require us to focus on them and live differently, conscious of our footprints on the planet. The cosmos has vacuum, not oxygen, so we aren't going anywhere else.   Spaceship Earth is incredibly productive but it is not infinite, so we'd better adapt to what it provides if we want to survive.  In Nature, endless growth is overshoot or "cancer."  Steady state is the only plausible  solution.