From Campfires to Power Grids
For most of human history, energy was simple and limited. Our earliest ancestors harnessed fire around 2 million years ago. It gave us warmth, protection, and the ability to cook food—unlocking more calories and bigger brains.
By ancient times, people added muscle power (human and animal), water wheels in Mesopotamia and China for irrigation and grinding grain, and windmills in Persia and Europe for milling and pumping water. These “renewables” were ingenious but tiny in scale.
The game-changer came in the 1700s with the Industrial Revolution. James Watt’s improved steam engine (building on Thomas Newcomen’s 1712 design) turned coal into mechanical power. Factories, trains, and ships exploded in productivity. Coal became king.
By the late 1800s, electricity arrived. Thomas Edison flipped the switch on the first commercial power plant in New York City in 1882. Suddenly, lights, appliances, and factories ran on invisible electrons. Oil powered cars and planes in the 20th century, while nuclear energy joined the mix in the 1950s–60s. Energy transitions were slow as coal took decades to surpass biomass, but they transformed society from agrarian to industrial to the modern digital age.