Evolution
It all starts with the blasting discoveries of medical science: they now say it is legal to cross different species to run genetical testing...to find the cure for what? unicorns? bigfoot? Other mythical creatutures we might want to investigate? We don't merely know how an alligator differs from a fish, and why we are not allowed to eat it during fast days as a replacement.
And then it hits me: while monkeys will be eventually trained to adapt to telepathic communication, humans will be texting it in hashtags to develop from mental and egomaniacal stimuli via twitter or facebook.
We will then seek the privilege to copulate with such a fine exponent of the close related species, and be endowed in the sacred noble art of looking at each other with no restriction of time or value derived from scarcity. And scratch each other's back.