The Five, also known as the Mighty Handful or The Mighty Five, were five prominent 19th-century Russian composers who worked together to create a distinct national style of classical music: Mily Balakirev, César Cui, Modest Mussorgsky, Nikolai Rimsky-Korsakov and Alexander Borodin. They lived in Saint Petersburg and collaborated from 1856 to 1870.

Mily Alexeyevich Balakirev was a Russian composer, pianist, and conductor known today primarily for his work promoting musical nationalism and his encouragement of more famous Russian composers, notably Pyotr Ilyich Tchaikovsky. He began his career as a pivotal figure, extending the fusion of traditional folk music and experimental classical music practices begun by composer Mikhail Glinka. In the process, Balakirev developed musical patterns that could express overt nationalistic feeling. After a nervous breakdown and consequent sabbatical, he returned to classical music but did not wield the same level of influence as before.