Khrushchev wrote to Fidel Castro to discuss the issues in the two countries' relation after the Cuban Missile Crisis. The Soviet leader attacked voices from other countries, including socialist ones, blaming the USSR of being opportunistic and self-serving. He explained the decision to withdraw missiles from Cuba, stressing the possibility of advancing Communism through peaceful means. Khrushchev underlined the importance of guaranteeing against an American attack on Cuba and urged Havana to focus on economic, cultural and technological development to become a shining beacon of socialism in Latin America. Besides, he also invited Fidel Castro to visit Moscow and discuss the preparations for such a trip.