"Humans are the only species capable of seeing our home from this unique vantage point in space or imagining how it came to be this way. We have always asked big questions about the origins of our world and our place in it. However, that place has changed dramatically over time. Over the past 10,000 years, people have gone from living in small groups of familiars to nations of strangers numbering millions. Tribalism, one of our most powerful evolved psychological biases, has contributed to this expansion. Now, however, it has led humanity to a cliff edge."

Source: New Scientist