Most people working on hard problems, the kind affecting hundreds of millions of people across health, education, financial access, and climate, have calculated the size of the market. The number of people affected, the scale of unmet need, or the Total Addressable Market (TAM) if this were a venture pitch. That calculation is usually large and usually correct.

Almost none have calculated the cost of solving it against what the system is already paying to leave it unsolved. Those are different exercises. The first produces a budget. The second produces a position.

That second number, what it actually takes to deliver a verified unit of change at a price the system will pay, reframes everything. It tells you whether your solution is priced for a charity or for a contract. It tells you whether the economics have crossed. And it is the number that makes your position defensible to a government buyer, a capital allocator, or a serious investor.

This is the Crossover Point: the moment at which solving structurally becomes cheaper than leaving unsolved. Two curves, moving in opposite directions. The organisations that calculate where they cross move while others are still funding the old model.

You have priced the first curve. This edition is about the second.

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