When Hair premiered on Broadway in 1968, the musical garnered attention
for its reflection the current cultural moment. Critics acknowledged
this congruence of form, content, and zeitgeist as the production’s greatest
asset. This alignment with the Vietnam era proved a liability nine
years later when Hair received its first Broadway revival, particularly
when the musical’s authors replaced many of the libretto’s cultural references
with allusions to the 1970s, further illuminating the musical’s
inherently time-bound qualities.
New England Theatre Journal
Theatre & Dance
Vandevender, Bryan M.. "Splitting HAIR: Reviving the American Tribal Love-Rock Musical in the 1970s." New England Theatre Journal (2018) : 31-53.