The 1868 presidential election in Argentina repays attention on a number of counts. It was the first time that the efficacy of the formal constitutional machinery evolved in 1860 had been put to the test. It was unusual in that the result was not, on the one hand, a foregone conclusion, a mere legitimation of a choice that had already been made, nor, on the other, disputed by force of arms. It also marked a change of direction for the political elite, although the consequences of this would not work themselves through the political system until the 1870s. It is unnecessary to labour the manifold changes in Argentina in the early 1870s: massive immigration, the full impact of the railways, the beginning of the “golden age’ of British investment, the integration of Argentina into a world economy were complemented in the political sphere by the end of the Paraguayan war, the death of Urquiza, the last great caudillo, the failure of the last important separatist movement (the rebellion of López Jordán in Entre Ríos during 1870–3) outside the capital and of the porteño separatist revolt under ex—President Bartolomé Mitre in 1874.