Nineteenth-century European liberalism stemmed from two main sources. First, John Locke developed traditional natural law theory in a new direction. In his Second Treatise on Government, he argued that everyone has a property in his own person; this is exactly the self-ownership principle of Murray Rothbard’s libertarianism. On this basis, individuals could acquire property through appropriation.

The Trump administration EPA and Department of Transportation have announced their intent to change the Corporate Average Fuel Economy standard from what was decreed by their Obama administration predecessors. They were scheduled to reach 54.5 mpg in 2025. The new target will be 37 mpg.