It's commonly assumed that the emergence of language was a key element of the great leap. We of course know very little about the sociopolitical conditions that existed at the time, but there's no scenario I can think of that suggests how a sudden change in these conditions could have led to the emergence of language.
Noam ChomskyBiblical archaeology was developed early in this century in an effort to substantiate the authenticity of the Biblical account. It's by now generally recognized in Biblical scholarship that it has done the opposite. The Bible is not a historical text, and has only vague resemblances to what took place, as far as can be reconstructed. For example, whether Israel ever existed is not clear; if so, it was probably a small kingdom somewhere in the hills, apparently virtually unknown to the Egyptians.
Noam ChomskyWhen [ Paul Johnson] got to me he was in trouble, because I'm an old-fashioned conservative: married when I was 21, stayed married, 3 kids, live in the suburbs, no scandals, so nothing to write about. So what he did is concoct one of the nuttiest claims I've ever seen.
Noam ChomskyIf some small storekeeper somewhere decides he's not going to pay the money, the Godfather doesn't let him get away with it. The money doesn't mean anything to him, but he sends in his goons to beat him to a pulp. You have to establish credibility, otherwise conformity to your orders will tend to erode. International affairs runs in much the same way.
Noam ChomskyThere are no conservatives in the United States. The United States does not have a conservative tradition. The people who call themselves conservatives, like the Heritage Foundation or Gingrich, are believers in -- are radical statists. They believe in a powerful state, but a welfare state for the rich.
Noam Chomsky