[2][3] Mr Rodríguez formulated what is sometimes called the "Larreta Doctrine," which said nations of the Americas could "consider multilateral action against any member state violating elementary human rights.
"[4] Rodríguez Larreta argued that there a "parallelism" between democratic practice and respect for human rights in domestic politics and the maintenance of peace in the Americas.
Long and Friedman describe the Larreta doctrine as, "a tripartite precommitment mechanism to create a web of national commitments to democratic governance and the domestic protection of human rights, to establish a regional insurance policy against failures to maintain those commitments, and to obligate the great power and neighboring states to precommit to working through the regional system instead of unilaterally.
"[5] The "doctrine" was controversial, with Argentine Foreign Minister es:Juan Isaac Cooke and others, criticizing it as going against non-interventionism.
Rodriguez Larreta also served as a founding editor of El País[8] and received the Maria Moors Cabot prize in 1949.