around 4,000 BC, to the 1800s; faster growth since the Industrial Revolution, which ushered in the Industrial Age; and the fastest growth over the last century, which might be called the “Digital Age.” In 1900, the world population was estimated to be approximately 1.5 billion individuals. The most recent estimate puts the current world population at over 7.4 billion. Within the space of a century, we’ve more than quadrupled the number of Homo sapiens on this planet. This dramatic increase in human population is no accident. It’s a direct consequence of technological advances that have allowed
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