In the “No Progressivity” case, all income within a nation counts toward its capacity. There is no income threshold below which individual income is exempted from national capacity. Rather, when calculating capacity, each dollar of income – even for the poorest of the world’s people – counts as much as each dollar of the world’s richest. Importantly, this setting is inconsistent with the conventional progressive approach that virtually all societies have adopted for the purpose of income taxation, and it is difficult (if not impossible) to justify in equity terms. Nonetheless we include it here as a lower bound.