The document discusses Los Angeles' energy history from 1857 to 1957, highlighting the alternative energy technologies that existed even early on but were not fully adopted. It notes that in 1857, human and animal labor as well as wind and sun provided energy, while by 1907 coal, manufactured gas, oil, and natural gas were used alongside other technologies like electric railways and solar hot water heaters. It argues that choices between technologies are often marginal and that both old and new technologies can coexist, providing examples like the debate between wave and airplane technologies in the early 1900s. The document suggests that technological changes result from people and organizations, not an inevitable process, and that the dominance of automobiles over electric railways in Los Angeles resulted