ONCE upon a time in my younger years and in the dawn of this century I wrote: “The problem of the Twentieth Century is the problem of the color line.” It was a pert phrase which I then liked and which since I have often rehearsed to myself, asking how far was it prophecy and how far speculation? Today, in the last year of the century’s first quarter, I propose to examine this matter again, and more especially in the memory of the great event of these great years, the World War. How deep were the roots of this catastrophe entwined about the color line? And of the legacy left, what of the darker race problems will the world inherit?