THE NEED TO LIMIT ENERGY USE
ENERGY: AN ADDICTION OR A NECESSITY?
Energy is arguably the most defining aspect of industrial civilization. For the first couple hundred thousand years of human existence, our ability to affect the world around us was limited by the amount of energy the human body can produce. It is estimated that, on average, a fit laborer can produce about 75 Watts of energy over an eight hour period. To those of us not familiar with energy terms, let it suffice to say that´s not very much energy, at least compared to modern day usage.
Though the elites of past civilizations were able to harness vast amounts of human energy (usually through slavery) in order to build astounding civilizations (think of the Roman aqueducts and the Egyptian pyramids), the majority of our ancestors lived lives that were constrained by the limits imposed by the places and conditions where they lived. They simply didn´t have enough human energy to drastically change the world.
Many scientists who study the history of evolution consider that it was only a matter of time before our species was to make the leap into the world-altering people that we´ve become. A self-conscious brain capable of understanding the world around us coupled with a rotatable thumb that allowed us to modify our surroundings was a combination that undoubtedly was to lead us into the modern civilization that defines us.
When our ancestors first discovered how to harness the power of the steam engine in the early 1800´s something changed in our world. For the first time ever, we were able to harness a power dozens of times greater than what we could produce from our own bodies or from the domestication of horses and other draft animals.
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