History -- Political aspects -- 20th century. -- 1 21st century. -- 1 Atomic bomb -- 1 Executive power -- 1 History. -- 1 more ... Imperialism -- 1 Insurrection, 1899-1901 -- 1 Masculinity -- 1 Natinal security -- 1 National security -- 1 Political aspects 1 Politicians -- 1 Psychology -- 1 Sex role -- 1 Social aspects 1 Spanish-American War, 1898 -- 1 less ...