Slavery was central to the economy, used by the elite to supply their own plantations and by Europeans on the coast. Taxes were arbitrary; one tax was even collected every time the king’s beret fell off. To become more prosperous, the Kongolese people would have had to save and invest—for example, by buying plows. But it would not have been worthwhile, since any extra output that they produced using better technology would have been subject to expropriation by the king and his elite. Instead of investing to increase their productivity and selling their products in markets, the Kongolese moved
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