We may not have five years - or we may have seven - it's open to discussion. But if enough people who share a similar philosophy would unite and cooperate, their survival quotient would improve.Good presentation, though I don't think we have 5 years and then of course there is the matter of who you may trust. We've done a pretty poor job of trusting many of the politicians placed in powerful positions to date.
It's true that "good folks" who formed cooperatives, communes and religious enclaves were often infiltrated by parasites and plunderers. Usually, the founders were zealous and committed to the group goals. Those who came afterwards, were a problem. Shaker communities often reported an influx of ne'er do wells every winter, seeking "help" and disappearing when springtime came around, with its uptick in farming chores.
As to rules, I like to keep it simple : "What's yours is yours, what's mine is mine, don't trespass."
Be considerate of others. Be charitable, forgiving, and compassionate. But don't be a doormat for the evil doers. Tolerance of evil is unmerciful to their next victim. Sacrificing yourself is one thing. Sacrificing others for your own benefit is another.