Sakharov was a man inclined toward the purities of theoretical physics but who became the conscience of the Soviet Union, a political actor in spite of himself. His physics and his politics grew out of the same mind, the same sense of wholeness and responsibility. “Other civilizations, perhaps more successful ones, may exist an infinite number of times on the preceding and following pages of the Book of the Universe,” Sakharov wrote in his Nobel Prize lecture. “Yet we should not minimize our sacred endeavors in the world, where, like faint glimmers in the dark, we have emerged for a moment
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