S
- Sá Carneiro, Francisco Manuel Lumbrales de
- Sábados Comunistas
- Sabata, Jaroslav
- Saburov, Maxim Zakharovitch
- Sacaze, François
- Sacchetta, Hermínio
- Sacco, Ferdinando Nicola
- Schäffle, Albert Eberhard Friedrich
- Sachs, Érico Czaczkes
- Sachs, Jeffrey
- Sader, Eder Simão
- Sadler, Michael Thomas
- Sadoul, Jacques
- Sadovsky, Vadim Nikolayevitch
- Safárov, Gueórgui Ivánovitch
- Saffioti, Heleieth
- Saint-Arnaud, Armand Jacques Achille Leroy de
- Saint-Just, Emmanuel-Marie-Michel-Philippe Fréteau
- Saint-Just, Louis Antoine
- Saint-Priest, Emmanuel Louis Marie, visconde de
- Saint-Simon, Claude-Henri de
- Sainte-Beuve, Pierre Henri
- Saisset, Jean
- Sakartvelo (Geórgia)
- Sákharov, Andrei Dmítrievitch
- Sakharov, Leonid Solomonovich
- Salazar, Antônio de Oliveira
- Salgado, Plínio
- Salié, Marina Evguénievna
- Sallandrouze, Charles Jean
- Saltykov, Alexei Dmitrievitch, príncipe
- Salvandy, Narcisse Achille, conde de
- Salviano de Marselha
- Samarin, Yuri Alexandrovich (Kvashin)
- Samoilov, F. N.
- Sān Mín zhǔyì (Os Três Princípios do Povo)
- Sanatzia (Sanacja)
- Sanches Osório, José Eduardo Fernandes
- Sand, Jorge pseudônimo de Aurore Dudevant
- Sandino, Augusto Nicolás Calderón
- Sankara, Thomas Isidore Noël
- Sankey, Ira David
- Sankt Peterbúrgski Rabótchi Listok (Boletim Operário de São Petersburgo)
- Sankt-Peterbúrgskie Védomosti (Notícias de São Petersburgo)
- Santa Aliança
- Santos, Aurélio
- Santos, Theotônio dos
- Saprónov, Timofei Vladímirovitch
- Saragat, Giuseppe
- Saraiva, Otelo
- Saramago, José
- Sartorius von Waltershausen, August
- Sartre, Jean-Paul
- Sauckel, Ernst Friedrich Christoph (Fritz Sauckel)
- Saunders, Robert John
- Saussure, Henri de
- Savenko, Anatóli Ivánovitch
- Sávinkov, Borís Viktorovitch
- Savoia-Carignano, Carlos Alberto de
- Sax, Emil
- Say, Jean Baptiste
- Sazónov, Gueórgui Petróvitch
- Schacht, Hjalmar Horace Greeley
- Schaetzel, Tadeusz
- Schaff, Adam
- Schaper, von
- Schapiro, Alexandre
- Schapper, Karl
- Scheele, Karl Wilhelm
- Scheidemann, Philipp
- Schelling, Friedrich Wilhelm Joseph
- Scherzer, Andreas
- Schiff, Josephine Ilyinichna
- Schilder, Siegmund
- Schiller, Friedrich
- Schippel, Max
- Schirach, Baldur Benedikt von
- Schlick, Friedrich Albert Moritz
- Schlöffel, Gustav Adolf
- Schlosser, Friedrich Christoph
- Schmidt, Conrad
- Schmidt, Heinrich
- Schmidt, Vassíli Vladímirovitch
- Schmoller, Gustav Von
- Schmollers Jahrbuch (Anuário de Schmoller)
- Scholl
- Schomann, Georg Friedrich
- Schopenhauer, Arthur
- Schorlemmer, Carl
- Schotmann, Alexandr Vassílievitch
- Schouw, Joakim Frederik
- Schramm, Jean Paul Adam
- Schramm, Karl August
- Schramm, Rudolph
- Schubert-Soldern, Richard von
- Schulz, Wilhelm
- Schulze-Delitzsch, Herman
- Schulze-Gaevernitz, Gerhardt von
- Schulze, Gottlob Ernst
- Schumacher, Kurt
- Schuppe, Wilhelm
- Schurz, Karl
- Schwarzenberg, Felix, príncipe
- Schwarzer, Ernst
- Schwegler, F. K. Albert
- Schweitzer, Johann Baptist von
- Schwerin, Maximilian Graf
- Schwitzguebel, Adhémar
- Scott, Walter
- Scotus, John Duns
- Scrope, George Julius Poulett
- Sébastiani, Horace, conde
- Secchi, Angelo
- Secchia, Pietro
- Sechenov, Ivan Mikhailovich
- Sedov, Lev Lvóvitch
- Seel, Richard
- Seeley, Robert Benton
- Ségur d'Aguesseau, Raymond Paul
- Seidlitz, Georg von
- Seixo, Maria Alzira Semião dos Santos
- Sejm
- Semard, Pierre
- Sembat, Marcel
- Semiónov, Grigóri Mikháilovitch
- Semkóvski (Bronstein, Semión Iúlievitch)
- Senior, Nassau William
- Sentinelle, La
- Serebriakov, Leonid
- Serebróvski, Aleksandr Pávlovitch
- Serge, Victor
- Serebriakov, Ésper Alexándrovitch
- Seredá, Semión Pafnútievitch
- Seredi, Jusztinián Gyorgy
- Serfaty, Abraham
- Sergueiev, Artem Fédor
- Serno-Soloviévitch, Alexandr Alexándrovitch
- Serrati, Giacinto Menotti
- Sertório, Manuel
- Servet, Miguel
- Sérvio Túlio
- Sève, Lucien
- Sévernaia Rabótchaia Gazeta (Jornal Operário Setentrional)
- Sextus Empiricus (Sexto Empírico)
- Seyss-Inquart, Arthur
- Shachtman, Max
- Shaftesbury, Anthony Ashley Cooper, 7.º Conde de
- Shaftesbury, Anthony Ashley-Cooper, 3.º Conde de
- Shakespeare, William
- Shapper, Karl
- Shardakov, Mikhail Nikolayevich
- Shaumyan, Stepan Georgievich
- Shaw, George Bernard
- Shaw, Robert
- Shelley, Percy Bysshe
- Shemyakin, Fyodor Nikolayevich
- Shepilov, Dmitri Trofimovich
- Shevarev, Pyotr Alekseyevich
- Shliapnikov, Alexander
- Shorokhova, Ekaterina Vasilyevna
- Shvyrev, Vladimir Sergeevich
- Sickingen, Franz von
- Sidmouth, Henry Addington, Viscount
- Sieber, Nikolai Ivánovitch
- Sigel, Franz
- Sigwart, Christoph von
- Sigwart, Heinrich Christoph Wilhelm von
- Sik, Ota
- Sikorski, Władysław Eugeniusz
- Sila, Lúcio Cornélio
- Silva, Lindolfo
- Silva, Oswaldo Pacheco da
- Silva, Sebastião Gomes da
- Silva, Virgílio Gomes da (Jonas)
- Simon, John Allsebrook
- Simon, Jules
- Simon, Sir John
- Simpson, J.
- Sin Otétchestva (Filho da Pátria)
- Sinani (Georgy Borisovich Skalov)
- Sindicalismo Revolucionário
- Sindicatos Amarelos
- Singer, Paul
- Sipiaguin, Dmitri Sergueivitch
- Sirtsov, Serguei Ivánovitch
- Sindicatos Hirsch-Duncker
- Sísifo
- Sismondi, Jean Charles Léonard Simonde de
- Sitbon, Guy
- Skáldine (Elénev, Fiódor Pávlovitch)
- Skarbek Frédéric, Graf von
- Składkowski, Felicjan Sławoj
- Sklianski, Ephraïm Markovitch
- Skóbelev, Matvei Ivánovitch
- Skoglund, Carl
- Skoropádski, Pável Petróvitch
- Skóropis-Ioltukhóvski, A. F.
- Skovoroda, Gregory Savvitch
- Skrípnik, Nikolai Alekséievitch
- Skubiszewski, Krzysztof
- Slansky, Rudolf
- Slavskaya-Abulkhanova, Ksenia Alexandrovna
- Sławek, Walery Jan
- Slepkov, Aleksandr Nikoláievitch
- Smenovezhismo
- Smetánine, Nikolai Stepánovitch
- Smilga, Ivar Tenisovich
- Smírnov, Aleksandr Petróvitch
- Smirnov, Anatoly Aleksandrovich
- Smirnov, E. (Gurévitch, Emmanuil Lvóvitcb)
- Smirnov, Ivan Nikitich
- Smirnov, Vladimir Mikhailovich
- Smith, Adam
- Smith, Edward
- Smith, Goldwin
- Smith, Joseph Burkholder
- Smith, Norman Kemp
- Snowden, Philip
- Snyder, Carl
- Soares, Mário Alberto Nobre Lopes
- Soares, Pedro
- Sobtchak, Anatóli Aleksándrovitch
- Social-Demokrat (Social-Democrata)
- Socialismo de Cátedra
- Socialismo de Estado
- Socialismo em um só país
- Socialistas Internacionais da Alemanha
- Socialistas-populares
- Sociedade Fabiana
- Société des Saisons (Sociedade das Estações do Ano)
- Sócrates
- Sodré, Nélson Werneck
- Soetbeer, Georg Adolf
- Sófocles
- Sohn-Rethel, Alfred
- Sokolnikov, Grigori Yakovlevich
- Soldat Revoliútzu (O Soldado da Revolução)
- Soldátskaia Pravda (A Pravda do Soldado)
- Soljenítsine, Aleksander Issáievich
- Solomone, Gueórgui Aleksándrovitch, verdadeiro apelido Issetski
- Solon
- Soloviov, Vladimir Sergeievitch
- Solovyov, Ivan Mikhailovich
- Sombart, Werner
- Sombartismo
- Somers, Robert
- Sonderbund (Liga separada)
- Sorel, Georges Eugène
- Sorge, Friedrich Adolf
- Sorge, Richard (na variante russa Rikhard Zórgue)
- Sorókine (Báuman, Nikolai Ernéstovitch)
- Sosnkowski, Kazimierz
- Sosnowski, Jerzy Ksawery Franciszek
- Sotsial-Demokrat
- Soulouque, Faustin
- Southby, Archibald Richard James
- Souvarine, Boris
- Sovietes
- Sovkhoz
- Sovremenni Mir (Mundo Contemporâneo)
- Sozialistische Monatshefte (Cadernos Mensais Socialistas)
- Sozialpolitisches Centralblatt (Folha Central Sociopolítico)
- Spandarian, Suren Spandárovitch
- Sparks, Jared
- Spartakistas (Liga Spartakus)
- Spector, Maurice
- Speer, Berthold Konrad Hermann Albert
- Spektátor (Nakhimson, Miron Issaákovitch)
- Spellman, Francis Joseph
- Spencer, Herbert
- Spengler, Oswald Arnold Gottfried
- Spilimbergo, Jorge Enea
- Spilka (União União Social-Democrata Ucraniana)
- Spínola, António Sebastião Ribeiro de
- Spinoza, Baruch (Bento)
- Spiridónova, Maria Alexándrovna
- Spiro, V. B.
- Spitaels, Guy
- Stadion, Franz, conde
- Stafford, William
- Stakanovismo
- Stakhanov, Aleksei Grigorievich
- Stalin, Joseph Vissarionovich Djugashvili
- Stallo, John Bernard
- Stanichev, Dimítri Iákov
- Starcke, Carl Nicolai
- Starobin, Joseph Robert
- Stassen, Harold Edward
- Stassiulévitch, Mikhaíl Matvéievítch
- Stauning, Thorwald
- Stauss, Emil Georg
- Stead, William Thomas
- Stefanoni, Luigi
- Steffen, Wilhelm
- Steffens, Joseph Lincoln
- Stein (Alexándrova, Ekaterina Mikháilovna)
- Stein, Julius
- Stein, Lorenz
- Stein (Rubinstein)
- Steinberg, Isaac Zakhárovitch
- Steklov, Iúri Mikhaílovitch
- Stepánov (Nikitme, Ivan Konstantínovitch)
- Stern, William Louis
- Steuart, James
- Steven, Stewart
- Stewart, Dugald
- Stieber, Wilhelm Johann Carl Eduard
- Stirling, James Hutchinson
- Stirner, Max (Schmidt, Kaspar)
- Stoecker, Adolf
- Stolberg,Christian zu
- Stolberg, Friedrich Leopold Graf zu
- Stolípine, Piotr Arkádievitch
- Storch, Heinrich Friedrich von (Andrei Karlovitch)
- Strahan, William
- Strákhov (Takhtariov, Konstantin Mikháilovitch)
- Strang, William
- Strasser, Josef
- Strauss, David Friedrich
- Streicher, Julius
- Ströbel, Heinrich
- Stroessner, Alfredo
- Strogovich, Mikhail Solomonovich
- Ström, Fredrik
- Strousberg, Bethel Henry
- Struik, Dirk Jan
- Struve, N. A.
- Struve, Piotr Berngárdovitch
- Struvismo (ou marxismo legal)
- Stuart, Ana
- Stuart, Charles Edward Louis Philip Casimir
- Stuart, James
- Stuarts
- Stukov, Innokenti Nikoláievitch
- Stumm, Karl
- Stüve, Johann Karl Bertram
- Suchodolski, Bogdan
- Sucre, Antonio José de
- Südekum, Albert
- Sudoplatov, Pavel Anatolyevich
- Sue, Eugène
- Sugenheim, Samuel
- Suharto, Hadji Mohamed
- Sukarno
- Sukhanov, Nikolai
- Sukhomlínov, Vladímir Aleksándrovitch
- Sully, Maximilian de Béthune, duc de
- Sultan-Galíev, Mirsaid Khaidargalievitch
- Sun Fo
- Sun Yat-Sen
- Supan, Alexander
- Surjeet, Harkishan Singh
- Surkov, Piotr Ilitch
- Susane, Louis
- Súslov, Mikhail Andréievitch
- Sutherland, Elizabeth, Duquesa de Strafford
- Suvorov, Sergei Alexandrovitch
- Svadkovsky, Ivan Fomich
- Sutherland, Harriet Elizabeth Georgina
- Sverdlov, Jakob Mikhailovitch
- Svoboda (Liberdade)
- Swabeck, Arne (Ben Webster)
- Sweezy, Paul Marlor
- Swiatlo, Josef, verdadeiro nome Izaak Fleischfarb
- Świtalski, Kazimierz
- Sybel,Heinrich von
- Szakasits, Árpád
- Szalasi, Ferenc
- Szász, Béla
- Szembek, Jan Włodzimierz Józef Cezary Stanisław Piotr Klemens Zygmunt
- Szemińska, Alina
- Szonyi, Tibor