Humans have been the most successful species on the planet (roaches and rats have done well, too).
Scientists credit our success to three traits: technology innovation, group collaboration, and communication. Humans not only have all three abilities, but we excel at all three. The question of when we started being human and flexing our abilities has been coming under constant revision in recent years.
Source:
http://blogs.forbes.com/bruceupbin/2011/07/10/human-ingenuity-a-100000-year-old-story/
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