Nicholas Calcott - ‘Hair,’ 1967

Members of the original casts of “Hair,” which played in various cities, including, from left: Charlotte Crossley, James Rado, Stan Shaw, Natalie Mosco, Leata Galloway, David Patrick Kelly, Meat Loaf, Ted Lange, Dale Soules, André de Shields and Marjorie Lipari.

“Every now and then, a piece of American performance is so memorable that it both redefines its medium and reframes the culture at large. Here, an appraisal of one such enduring and heavily referenced work — a youth-inflected 1967 musical that captured the popular (and political) consciousness — alongside a gathering of the stars who not only made it but were made by it, too.”