 The “deeper idea of reciprocity” (JF 124) implicit in the difference principle has just the opposite tendencies: the more advantaged may not gain at any point unless their gains benefit the least advantaged and benefit them maximally, better than any alternative arrangement of institutions. The best way to understand the deeper idea of reciprocity Rawls incorporates into the difference principle is by referring to figure 6 in Theory (sect. 13) and figure 1 in Justice as Fairness (p.62). The difference principle requires the distribution of powers, prerogatives, and economic resources that put the least advantage on the highest point on the efficient production curve, D, which is the point that is closest to an equal distribution. At D and all prior points on the curve, improvements to the most advantaged are always accompanied by improvements to the least advantaged and vice versa. Hence with all increments to social output, no one gains at any point at the expense of the other. This relationship of reciprocity does not hold at points to the right of D, where further gains to the more advantaged may increase aggregate wealth and utility, but come at the expense of the less advantaged.