What Darwin's popularizers missed is that mutual aid is as fundamental to evolution as competition. The major transitions in evolution, the great leaps from simple to complex. Every single one was a cooperation event. We are the latest chapter in a four-billion-year story of smaller things learning to work together.
The question for humans is whether we can do consciously what evolution has done through selection pressure. Can we choose cooperation. Can we choose to see that our survival is linked. Can we build systems and stories and commitments that make the cooperative move the obvious move.
When you see that, the strategy changes. Not because you become a saint. Because you update your math. You realize that the move that serves the most people also serves you best. That creating value for the system that you depend on creates conditions that serve you. That building capacity in others builds capacity you can rely on.