“Popular culture has turned divisive and pop-based musicals are unlikely to be outings that the whole family can enjoy. What gives the musical form its growing heritage status is an appeal that carries across the generations, from war vets to under-tens, and that is such a precious rarity in our fissured society that it demands conservation and participation. Poised at the midpoint of high and mass culture, musical theatre reaches the parts that more formal arts cannot begin to touch.”