In a report on the state of Poland in 1766 the papal nuncio, A. E. Visconti, observed that the new king, Stanisław August Poniatowski, possessed ‘a burning desire to reform the whole country in one day – if only he could – and the entire nation, in order to bring it up to the level of other, more advanced nations’. The interregnum after the death of Augustus III in October 1763 and Poniatowski's election in September 1764 had inaugurated the most determined campaign for reform within the Polish-Lithuanian Commonwealth since the Union of Lublin of 1569. By 1763–4 there was little that did not need to be reformed. The accumulation of privilege by the szlachta, the nobility, had attained such dimensions that both the monarchy and the Sejm, the parliament, were almost powerless to govern. The most obvious expression of the impotence of the state and of the refusal of the nobility to submit to the discipline of any centralized authority was, of course, the liberum veto, the use of which, real or threatened, had consigned the majority of the Sejmy of Augustus II (1697–1733) and of Augustus III (1733–63) to nullity. Yet the veto's successful, widespread application was only possible because of a rough equilibrium of political strength between Poland's various magnate factions.After Augustus Ill's death, Russian military backing enabled the so-called ‘Family’, the party led by Michael Czartoryski (1696–1775) and his brother, August (1697–1782), to break through the stalemate. At the Convocation Sejm of 7 May to 23 June 1764, the Czartoryskis pushed through a series of unprecedented reforms aimed at conferring on the monarchy and the Sejm a degree of real authority over the country at large.