Time and the luck which would enable him to survive.

Beyond that there comes identity needs where communication does more than enable humans to survive.

It was the values of the founders that enabled them to survive.

Our ancestors had been genetically altered to enable them to survive on this world.

This enables them to survive in areas where temperatures can be low and food scarce.

"Perhaps it is the strength of our 'human' conscience that enables us to survive."

This enabled her to survive five years in the camp.

They formed part of the culture that enabled it to survive as a people in a harsh environment.

This would have enabled him to survive for a few days.

Only the fact that Henry had so many other calls on his energy and resources enabled them to survive.