1. Tries to cooperate at first, and expects the other to do the same.
2. Is retaliatory but in proportion to the defection less signal-error. Is not a pushover, if defected against, a measured 1 for 1 response will be extracted from the other side, then olive branches offered with exponential backoff/decays given information gain on policy.
3. Is forgiving, but in proportion, if evidence shows the other side is willing to cooperate, steps are taken to hold your end of the bargain.
4. Does not exploit a weakness, and isn't deceptive, knowing that inclusive fitness of "our approach" is itself a viral organism, and makes "me" a meta-organism of many actors working as one which can out compete any number of defectors working in unity. If detected an opportunity for exploitation, it does not take it, instead always choosong coop-coop.
5. If engaging with one who exploits, makes sure they lose in proportion to their exploitation. Star Trek voyager, "The void" janeway's alliance-making program, defines what these 5 steps look like in practice. Blue 666 Hydra Klan is every single office in the whitehouse.
https://www.youtube.com/watch?v=YQykZU8mcZY