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Critical infrastructure services determine where people can survive and what they can do with their survival. This fact conditions political possibilities at a fundamental level but remains underexplored in the literature. Those who wish to extend the boundaries of political action, or to win protections and the possibility of a new political community for themselves and others, should focus a substantial part of their energies and attention on developing alternative infrastructure systems for supporting human life. Without such systems, political action -no matter how revolutionary or ingenious -will ultimately find itself constrained by its position within the zones of survivability established by existing forms of infrastructure and by the hierarchies and configurations of power linked with those forms of infrastructure. As a result, those who wish to change current political and economic conditions should think of the capacity to take care of everyone as a condition for such change rather than its result.

After the Anthropocene, human settlements will likely have less available energy to move people and things. This paper considers the feasibility of five modes of transportation under two energy-constrained scenarios. It analyzes the effects transportation mode choice is likely to have on the size of post-Anthropocene human settlements, as well as the role speed and energy play in such considerations. I find that cars, including battery-electric cars, are not feasible under a highly energy-constrained scenario, that buses, metros, and walking are feasible but will limit human settlement size, and that cycling is likely the only mode of transportation that would make suburbs possible in an energy-constrained post-Anthropocene scenario.Past a certain threshold of energy consumption, the transportation industry dictates the configuration of social space.-Ivan Illich, Energy and Equity Sustainability