The music of Puerto Rico has evolved as a heterogeneous and dynamic product of diverse cultural resources. The most conspicuous musical sources have been Spain and West Africa, although many aspects of Puerto Rican music reflect origins elsewhere in Europe and the Caribbean and, in the last century, the USA. Puerto Rican music culture today comprises a wide and rich variety of genres, ranging from essentially indigenous genres like bomba to recent hybrids like reggaeton. Broadly conceived, the realm of "Puerto Rican music" should naturally comprise the music culture of the millions of people of Puerto Rican descent who have lived in the mainland USA (and Hawaii), and especially in New York City. Their music, from salsa to the boleros of Rafael Hernández, cannot be separated from music culture of Puerto Rico itself. Nevertheless, this entry will emphasize music culture as it has flourished on the island; readers should naturally consult other entries for genres like salsa (most commonly thought of).