He grew up next door to Oscar Hammerstein and became his greatest protege. In 1957, he wrote the lyrics for "West Side Story," and for the next 60 years dominated the world of musical theater, and transformed it.  His songs managed to express the most complex and vital human emotions, and touched generations of theatergoers.  Stephen Sondheim was still writing and composing at 91, until Thanksgiving night, when he died suddenly, hours after dining with a group of friends.  The shows he leaves behind include "West Side Story," "Gypsy," "A Funny Thing Happened on the Way to the Forum," "Company," "A Little Night Music," "Sweeney Todd," "Sunday in the Park with George," "Into the Woods," and "Assassins." In this episode, which originally posted in 2018, he pulls back the curtain on his life and work, giving fascinating insights into some of the greatest Broadway collaborations of all time, and into the process of writing a song for the stage.