Population growth, if it continues long enough, may also lead to unvoidable scarcity. As pointed out by Paul Ehrlich, Albert Bartlett, and others, exponential growth in human population has the capacity to overwhelm any finite supply of resources, even the entire known universe, in a remarkably short time. For example, if the human population could continue to grow indefinitely at its 1994 rate, in 1,900 years the mass of the human population would equal the mass of Earth, and in 6000 years the mass of the human population would equal the estimated mass of the observable universe.
Although this would imply the invention of faster than light travel, necessary for humanity to spread throughout the universe as fast as population growth, even at lower growth rates these levels would still be reached in readily imaginable times. It is therefore difficult to conceive of a credible post scarcity scenario which does not also imply zero population growth or very low population growth.
- living the future: Sharewiki collects theoretical and practical information and ideas for a life in abundance and post scarcity through (universal) sharing