Ed. note: Geologist and petroleum engineer Julián Salazar Velásquez, with nearly a half-century in the Mexican and Venezuelan oil industries, is a leading educator and proponent of free market energy. In addition to numerous articles, his book Gerencia Integrada de Campos de Hidrocarburos (2020) is a primer on the oil industry value chain. His four-part … Continue reading What Has Been the Role of Petroleum in Human Progress? (Part IV)