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“Increasingly, rather than render nighttime more accessible, we are instead risking its gradual elimination. Already, the heavens, our age-old source of awe and wonder, have been obscured by the glare of outdoor lighting. Only in remote spots can one still glimpse the grandeur of the Milky Way. Entire constellations have disappeared from sight, replaced by a blank sky. Conversely, the fanciful world of our dreams has grown more distant with the loss of segmented sleep and, with it, a better understanding of our inner selves. Certainly, it is not difficult to imagine a time when night, for all practical purposes, will have become day—truly a twenty-four/seven society in which traditional phases of time, from morning to midnight, have lost their original identities. ........... The residual beauty of the night sky, alternating cycles of darkness and light, and regular respites from the daily round of sights and sounds—all will be impaired by enhanced illumination. Ecological systems, with their own patterns of nocturnal life, will suffer immeasurably. With darkness diminished, opportunities for privacy, intimacy, and self-reflection will grow more scarce. Should that luminous day arrive, we stand to lose a vital element of our humanity—one as precious as it is timeless. That, in the depths of a dark night, should be a bracing prospect for any spent soul to contemplate.”