Last and First Men Capitalism, Communism, and the End of History

We can take as a starting assumption that globalization via the capitalist market is threatening destruction of a planet. So therefore a non-capitalist aftermath is the only option, along with the prospect of no-growth economies. At that point, the debate tends to shift gears toward the failsafe: communism. This starting assumption could prove false, but the necessary work of a gedanken experiment should at least be the first order of business. At a minimum the 'end of history' delusion in favor of unlimited, eternal free markets must be dispelled to free thought in a crisis.