From an obituary at The Times (full article here)

Gian Carlo Menotti was one of the most significant composers to come forward after the Second World War. A self- confessed and unrepentant traditionalist, he continued to write prolifically in his own vein, even after the fashion for his kind of music-drama had passed.
He achieved fame when his first full-length opera, The Consul, caught the imagination of the public after it was staged in New York in 1950. A newspaper article inspired the work.

Gian Carlo Menotti was born in northern Italy at Cadegliano, in Varese province, in 1911, the sixth of ten children. His father was a prosperous businessman and his mother a talented musician. He had already written two operas when he entered the Milan Conservatory at the age of 13.

(...)

Its success prompted a commission from NBC for a radio opera. Another one-act work, The Old Maid and the Thief, was the result, and proved another success for the young composer. It led to what many consider to be Menotti’s two most successful pieces, the melodrama The Medium, which never fails to catch an audience by the throat, and The Telephone, a one-act, single-performer comedy, which became a curtain-raiser for The Medium.

His later works showed him tending to repeat formulas without recapturing his old form. The Last Savage, a 20th-century morality, staged in Paris in 1963, is probably the best of them and Help! Help! The Globolinks (Hamburg, 1968) showed him once more writing with sympathy for children. Menotti, who wrote his own librettos, also contributed the book for Samuel Barber’s opera Vanessa. The composers were close friends.

In 1928 he moved to the US to study at the Curtis Institute in Philadelphia where his friendship with Barber began. The pair went to festivals in Europe together in the early 1930s. Menotti decided to stay in the US in 1933.

His success with Amelia at the Ball and the works that followed it only confirmed his decision, though he never lost his love for Italy, nor indeed his gift for Italianate melody.
He was 96 at the time of his dead. I guess they did let him stay a little longer.