Researchers from the University of York have published a finding in the journal Open Quaternary, suggesting that moral disputes arising from betrayals of trust made man to cross into wider and farther reaches of the Earth nearly 100,000 years ago.
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Researchers have always wanted to know the reasons behind the effective dispersal of man across the face of the Earth, but with recent findings, Dr. Penny Spikins of the Department of Archaelogy at the University of York noted that the rate of human dispersal about 10 decades ago was fueled by emotional human reactions to one another.
But previous to this period, environmental and natural events among other ecological changes made man to move slowly from one place to the other; but this changed when the darker sides of human nature began to emerge and man felt the need to go farther away from his own species – hastening his speed of separation and wider distances covered.
The darker sides of humans started to show when they developed emotional relationships one to another, and when they developed justice system of punishing offenders, and surviving in a more competitive environment among one another. Then betrayals of trust and broken trusts became the order of the day, and moral disputes drove the edge between people as they got farther away from one another.
Earlier species of man such as hominin concentrated more in grasslands and open woodlands; and then the Homo erectus thronged out of Africa and went into Asia some 1.6 million years ago, creating the need for their hosts to disperse farther. The Neanderthals were already in the arid and cold regions of Europe at this time.
But when relationship hurts started to emerge in human character, those that lived in grasslands and open woodlands began to risk their lives to go farther into inhospitable and risky environments. The moving people would not be stopped by bio-geographical barriers, and they went into the cold parts of Northern Europe.
"Active colonization of and through hazardous terrain are difficult to explain through immediate pragmatic choices,” Dr. Spikins said. “But they become easier to explain through the rise of the strong motivations to harm others even at one's own expense which widespread emotional commitments bring.
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"Moral conflicts provoke substantial mobility – the furious ex ally, mate or whole group, with a poisoned spear or projectile intent on seeking revenge or justice, are a strong motivation to get away, and to take almost any risk to do so,” she added.