Born in 1921, John Rawls would have celebrated his 100th birthday in 2021. The 2021 also marked the 50th anniversary of the publication of A Theory of Justice, his magnum opus. To celebrate, political, legal, moral, and social philosophers and theorists convened around the world to participate in conferences, workshops, and seminars. Many prominent journals and publishers ventured special issues and volumes. This special issue is the Journal of Social Philosophy's contribution.Fourteen months after the 9/11 attacks in the United States, Rawls died in 2002. At that point, and despite the many obituaries and articles then praising his achievements, it was somewhat unclear how his work would fare in the coming years. A commonly expressed thought was that whatever practical philosophical relevance his work had had, a rapidly changing world had eroded it significantly. Of course, few doubted that his work would remain of historical interest. But the time had come for political philosophy to move on. Or so to many it then seemed. And there are today, of course, those who continue in one way or another to express this view.But over the last two decades, it has become harder rather than easier to dismiss the practical philosophical relevance of Rawls' work. Cascading and converging crises have catalyzed growing despair over both constitutional republican liberal democracy and a peaceful and reasonable international order. Reasonable, inclusive, and deliberative political and law-making activity has been steadily sidelined by the destructive interplay of dogmatic fanaticism and apathetic resignation. Ideals, especially when constructed from materials drawn out of a lived, and so always to some significant degree defective, tradition are routinely disparaged as mere ideology. Though sometimes difficult to appreciate in the heat of the present historical moment, the practical philosophical relevance of Rawls' work has perhaps never been greater. At least that is the view animating this special issue.First published in 1971, A Theory of Justice challenged (and still challenges) readers. It has often been remarked that it expressed a mid-20th century liberal sensibility that was already rapidly passing from the scene by the early 1970s. But this is not quite accurate. The liberal sensibility that was dominant in the mid-20th century steadily converged on the