The roots of Cuban music go way back, to pre-Columbian times. The Revolution only changed, or attempted to change, certain characteristics of music, while others were allowed to flourish (Chomsky, 120). Traditional Cuban “son” music experienced an international revival in the 1990s, after the revolution (Chomsky 121). The Revolution gave traditional music more modern variations. In 1965, musician Carlos Puebla wrote "Hasta Siempre Comandante" about Che Guevara's departure from Cuba to spread the Revolution elsewhere. Cuba took the “New Song” movement that was happening in other Latin American countries and made it “Nueva Trova” in Cuba. The aim of “Nueva Trova” was to challenge commercial and foreign control of the airways, by playing traditional, meaningful and authentic songs. Throughout Latin America and Cuba, people embraced indigenous musical roots instead of being influenced by the popular sounds of the time (Chomsky 121). Cuban rap music also flourished, but later, in the post-revolutionary 1990s. Cuban rap was a new aspect of music influenced in part by the lack of political influence and modern sounds, but also by the edginess and secrecy imposed by the Revolution (Chomsky 122). The popularity of rap music made its concept less radical, but in a very short time, people began praising rap for its rejection of the normal social norms of the time (Chomsky 122). Cuban rappers may have networked with some American rappers due to similar interests, but in reality it was a plan to criticize capitalism and accept the freedoms granted to them by the Revolution. Many modern musicians have struggled to reject what was popular and accepted. (Chomsky