This is a follow up question to one that I made earlier. Basically, after God wiped out all life after the flood, earth has changed into a lush but dangerous environment. Every living thing, from plants to animals, has evolved to be hostile and prey on each other. This forces species to constantly adapt and change in order to survive, speeding up the process of evolution from millions of years to generations.
Humanity has lost a many advantages due to their prey evolving to become better at killing them. In order for them to survive as a species, they must change faster than we do today. One way to do this is to change the way we reproduce in certain ways to allow us to compete. Some of the goals that I think should be met are:
Every allow of copulation mist be met with success.
Multiple births must be the norm (twins, triplets, quadruplets, etc)
Pregnancies must be shorter.
Humans must grow up and become self-sufficient much faster.
How can I alter the reproductive cycle in order to meet these parameters?