Foreign economic relations -- 2 Relations -- 2 Commerce -- 1 Communication and culture -- 1 Congresses 1 Congresses -- 1 Economic policy -- 1 more ... Foreign relations -- 1 Intercultural communication 1 Marine resources -- 1 Military relations -- 1 Sea-power -- 1 Social conditions 1 Social life and customs 1 Social values -- 1 Strategic aspects -- 1 less ...