Resumen: This study, which is divided in two papers (I: The Demos and the Oligarchs in 411 BC; and II: The Social Support of the Thirty and that of the Demos in 404/3 BC), evaluates the social support that revolutionary movements in Athens gets at the end of the 5th century BC. Specialists believe that Athenian citizens are split into two parts, depending on whether they are for or against democracy. However, this essay shows that demos’ political consciousness was in fact almost non-existent. Despite its preference for a popular power system, the multitude remains quiet without the direction of its democratic leaders, who act driven not by principles, but by prospects of power or just patriotism. Something similar happens to the leaders of oligarchy: only a few are true ideologists (Antiphont or Critias for example). Most of them just display their discomfort with how democracy has been corrupted by a handful of demagogues, but show that they feel ready to quit the oligarchic project as soon as any further difficulty arises. It is not ideological convictions, but personal motives or their positions on the war, that cause disaffection among revolutionary groups. Therefore it should be taken seriously what Thucydides said about those who are «in the middle» in a stásis, that is, citizens who did not take sides; and about the arguments that «those of the city» (citizens who support the power of the Thirty) expressed during judicial processes and the dokimasíai. Idioma: Español Año: 2016 Publicado en: Athenaeum 104.1 (2016), 5-30 ISSN: 0004-6574 Factor impacto SCIMAGO: 0.13 - Classics (Q2) - Literature and Literary Theory (Q2) - History (Q2)