Martha Washington's worst memory was the death of her husband. Her second worst was Thomas Jefferson's awkward visit to pay his respects. Indeed, by the time George Washington died in 1799, the two founders were estranged. But that estrangement has obscured the fact that for most of their thirty-year acquaintance they enjoyed a productive relationship. Precisely because they shared so much, their disagreements have something important to teach us. Whereas Washington believed in the rule of traditional elites like the Virginia gentry, Jefferson preferred what we would call a meritocratic approach, by which elites would be elected on the basis of education and skills. And while Washington emphasized a need for strong central government, Jefferson favored diffusion of power across the states. Still, as Francis Cogliano argues, common convictions equally defined their relationship: a passion for American independence and republican government, as well as a commitment to westward expansion and the power of commerce. They also both evolved a skeptical view of slavery, eventually growing to question the institution, even as they took limited steps to abolish it. A Revolutionary Friendship captures the dramatic, challenging, and poignant reality that there was no single founding ideal-only compromise between friends and sometime rivals.