Every Valley: The Desperate Lives and Troubled Times That Made Hendel's MessiahGeorge Frideric Handels Messiah is arguably the greatest piece of participatory art ever created. Adored by millions, it is performed each year by renowned choirs and orchestras, as well as by audiences singing along with the words on their cell phones. But this work of triumphant joy was born in a worried age. Britain in the early Enlightenment was a place of astonishing creativity but also the seat of an empire mired in war, enslavement, and