Sábados Comunistas Sacchetta, Hermínio Sacco, Nicola Sadoul, Jacques Saint-Arnaud, Armand Jacques Achille Leroy de Saint-Just, Louis Antoine Saint-Priest, Emmanuel Louis Marie, visconde de Saint-Simon, Claude-Henri de Sainte-Beuve, Pierre Henri Salazar, Antônio de Oliveira Salgado, Plínio Sallandrouze, Charles Jean Saltykov, Alexei Dmitrievitch, príncipe Salvandy, Narcisse Achille, conde de Samoilov, F. N. San-min Chu-I (Os Três Princípios do Povo) Sandino, Augusto Nicolás Calderón Sankt Peterbúrgski Rabótchi Listok (Boletim Operário de São Petersburgo) Sankt-Peterbúrgskie Védomosti (Notícias de São Petersburgo) Santa Aliança Saragat, Giuseppe Sartorius von Waltershausen, August Savenko, Anatóli Ivánovitch Sávinkov, Borís Viktorovitch Savoia-Carignano, Carlos Alberto de Say, Jean Baptiste Sazónov, Gueórgui Petróvitch Schaper, von Schapiro, Alexandre Schapper, Karl Scheele, Karl Wilhelm Scheidemann, Philipp Scherzer, Andreas Schilder, Siegmund Schmoller, Gustav Von Schmollers Jahrbuch (Anuário de Schmoller) Schramm, Jean Paul Adam Schramm, Karl August Schulze-Delitzsch, Herman Schulze-Gaevernitz, Gerhardt von Schumacher, Kurt Schwarzenberg, Felix, príncipe Schwarzer, Ernst Schweitzer, Johann Baptist von Schwerin, Maximilian Graf Scott, Walter Sébastiani, Horace, conde Seeley, Robert Benton Ségur d'Aguesseau, Raymond Paul Semard, Pierre Sembat, Marcel Semkóvski (Bronstein, Semión Iúlievitch) Senior, Nassau William Sentinelle, La Serebriakov, Leonid Serge, Victor Serebriakov, Ésper Alexándrovitch Sergueiev, Artem Fédor Serno-Soloviévitch, Alexandr Alexándrovitch Sévernaia Rabótchaia Gazeta (Jornal Operário Setentrional) Shachtman, Max Shakespeare, William Shaumyan, Stepan Georgievich Shaw, George Bernard Shliapnikov, Alexander Sieber, Nikolai Ivánovitch Sigel, Franz Silva, Lindolfo Sin Otétchestva (Filho da Pátria) Sindicalismo Revolucionário Sindicatos Amarelos Sindicatos Hirsch-Duncker Sismondi, Jean Charles Léonard Simonde de Skáldine (Elénev, Fiódor Pávlovitch) Sklianski, Ephraïm Markovitch Skóbelev, Matvei Ivánovitch Skoglund, Carl Skóropis-Ioltukhóvski, A. F. Slansky, Rudolf Smilga, Ivar Tenisovich Smirnov, E. (Gurévitch, Emmanuil Lvóvitcb) Smirnov, Ivan Nikitich Smirnov, Vladimir Mikhailovich Smith, Adam Soares, Mário Alberto Nobre Lopes Social-Demokrat (Social-Democrata) Socialismo de Cátedra Socialistas-populares Sociedade Fabiana Sokolnikov, Grigori Yakovlevich Soldat Revoliútzu (O Soldado da Revolução) Sombart, Werner Somers, Robert Sorge, Friedrich Adolf Sorókine (Báuman, Nikolai Ernéstovitch) Sotsial-Demokrat Soulouque, Faustin Souvarine, Boris Sovietes Sovkhoz Sozialistische Monatshefte (Cadernos Mensais Socialistas) Spartakistas (Liga Spartakus) Spector, Maurice Spektátor (Nakhimson, Miron Issaákovitch) Spengler, Oswald Arnold Gottfried Spinoza, Baruch (Bento) Spiridónova, Maria Alexándrovna Stadion, Franz, conde Stafford, William Stakanovismo Stakhanov, Aleksei Grigorievich Stalin, Joseph Vissarionovich Djugashvili Stassen, Harold Edward Stassiulévitch, Mikhaíl Matvéievítch Stauss, Emil Georg Stead, William Thomas Steffen, Wilhelm Steffens, Joseph Lincoln Stein (Alexándrova, Ekaterina Mikháilovna) Stein, Lorenz Stein (Rubinstein) Steklov, Iúri Mikhaílovitch Stepánov (Nikitme, Ivan Konstantínovitch) Steuart, James Stieber, Wilhelm Johann Carl Eduard Stirner, Max (Schmidt, Kaspar) Stolípine, Piotr Arkádievitch Strákhov (Takhtariov, Konstantin Mikháilovitch) Strauss, David Friedrich Stroessner, Alfredo Struve, Piotr Berngárdovitch Stuarts Stüve, Johann Karl Bertram Sucre, Antonio José de Südekum, Albert Sue, Eugène Sukhanov, Nikolai Sun Yat-Sen Supan, Alexander Sutherland, Elizabeth, Duquesa de Strafford Sutherland, Harriet Elizabeth Georgina Sverdlov, Jakob Mikhailovitch Svoboda (Liberdade) Swabeck, Arne (Ben Webster)