Solidarity Compounds

The community isn't one pool. It's four parliaments — customer, worker, supplier, investor — each with its own capital, its own members, its own businesses. Left entirely to themselves, the small parliaments would crawl. A handful of workers can't fund businesses as fast as five hundred customers. Two mechanisms keep them from being stranded. Together, they turn out to be one of the model's quiet powerhouses.

The first is the cross slice — a portion of every business's return sent to the other parliaments as solidarity. The second is diversification: over time, members take on more roles. A customer also becomes a worker; a worker also a supplier. Their income then draws from several parliaments at once.

Below, the model runs (seed 12345). The monthly rate at which members take on a new role is swept from zero up to 5%. The curve is the year everyone reaches full coverage.

With no role-mixing at all, the community takes around eighteen years. That result is also perfectly deterministic, because role-mixing is the only randomness in the whole model. Allow even a modest 1.5% of members to take on a new role each month and it drops to about eleven. The gain flattens after that. But the first slice of diversification is worth years. Integration is not decoration. It is a load-bearing wall.

The reason: a member's income is the sum of the permanent streams they hold across every parliament they belong to. A customer-only family draws from one pool. A family that is also a worker and a supplier draws from three — three sets of businesses paying into their coverage. Diversification doesn't move money from one member to another. It lets each member stand in more places at once, and be lifted from all of them.

It also dissolves the very boundaries that made the small parliaments slow. As members spread across roles, the four parliaments behave more and more like one large pool. That is the emergent "convergence" the simulator plots directly. By full graduation the average member belongs to nearly three of the four. The cohorts don't compete for who finishes first. They merge into a single community that finishes together.

The cross slice works alongside diversification. It is deliberately a values lever more than a speed one. Sending returns from the large, fast customer parliament to the smaller ones keeps no cohort stranded — a direct expression of solidarity. But the cross slice diverts capital from each parliament's own compounding loop. So more cross generally means a slightly later finish, not an earlier one. It is the price of not leaving anyone behind. The model shows that price to be small.

Between the two, the lesson is the same. A community that integrates — mixing roles, sharing across cohorts — is faster and more resilient than four cohorts each optimizing alone. The whole is not just greater than the parts here. It is years ahead of them.