Without any formal training in music composition or even the ability to notate melodies on a musical staff, Irving Berlin took a knack for music and turned it into the most successful songwriting career in American history. Berlin was the first Tin Pan Alley songwriter to go "uptown" to Broadway with a complete musical score (Watch Your Step in 1914); he is the only songwriter to build a theater exclusively for his own work (The Music Box); and his name appears above the title of his Broadway sh...