There are some feminazi-evolutionist theories that say there was Eve before Adam, and that in a 100,000 years or so, it will be back just Eve - seems a crazy theory.
Curiously, I have a little background on this, but you haven't read my book yet.
Essentially, a world filled with women should be more peaceful, but I feel confident in predicting it would not be without aggression.
The fire that is humanity is composed of three ingredients:
Women are the fuel.
Men are the oxygen.
Sex is the spark.