[k__]

Evolution doesn't look into the future.

In the past, groups with women that were more risk averse would do better on average when the group was decimated and needed to repopulate.

Groups with women that took too many risks didn't survive.

So, now we have more risk aware women.

Risk taking for men didn't have that of an impact and might even have proven beneficial (e.g., Genghis Kahn, etc.)

Just my assumption...

[bluGill]

Don't forget a risk taking man may die but ensure the rest of the village (who he is closely related to) survives.