Brigham McCown discusses the history of power throughout human history, focusing on the transition from manual labor to the use of different energy sources. Brigham emphasizes the significance of coal in shaping society and supporting industrial expansion. Brigham mentions advancements in electricity and the development of wind, hydropower, and geothermal energy. In conclusion, Brigham talks about the use of biomass energy and hints at a future discussion on the future of energy generation.