By the end of the fifteenth century Poland had become an integral part of late-medieval civilisation. Lithuania, on the other hand, was largely left out of the picture, contributing nothing and gaining little from its association with Christian Europe. Lithuania proper was inhabited by no more than half a million people still pagan in spirit, while the vast expanses it had taken over to the south and east were thinly populated with some two million Slavs who practised Christianity in its eastern rite. At the moment of Władysław Jagiełło’s conversion, this vast dominion boasted five stone castles, at Vilnius (Wilno), Kaunas (Kowno) and Trakai (Troki) in Lithuania; and at Kamieniec and Łuck in what had been Kievan lands. Leaving aside the more fertile south, the land produced little wealth and most of the population subsisted from scratching the topsoil with wooden implements, living in dugouts or timbered cabins.
In 1387 Władysław Jagiełło granted the Lithuanian nobles the first element of personal freedom, the right to hold property. In 1434 he extended the act
The only link between the two societies was the Jagiellon dynasty itself, and it was its interests that prevailed. Władysław Jagiełło’s loyalties, to Lithuania and to Poland, were largely subjected to his own dynastic vision. His son Władysław III, killed at the Battle of Varna in 1444 in his twentieth year, never had the opportunity to show his mettle as a ruler. Władysław’s younger brother Kazimierz IV reigned for forty-six years and established himself as a power to be reckoned with—he was, significantly, the only Pole ever to wear the English Garter. His wife Elizabeth of Habsburg bore him seven daughters, who make him the ancestor of every monarch reigning in Europe today, and six sons: one saint, one cardinal, and four kings. Kazimierz was succeeded in Poland by Jan Olbracht, a young prince with a passion for reading who drank, danced and loved hard, dressed like a peacock and worshipped pleasure. His brother Aleksander was a much-loved lightweight who died in 1506 having done little to be remembered or cursed for.
While the Jagiellons acquired a high degree of culture, they did not develop the political maturity demanded by their new role. Throughout this formative century, when the magnates and the szlachta were erecting the structure of their democracy, the Jagiellon kings failed to define the prerogatives of the crown, wasting their resources on foreign adventures instead.
Kazimierz IV’s dynastically-minded foreign policy enmeshed Poland in a number of pointless and damaging conflicts. Turkey and Poland shared a common interest, and in 1439 an embassy from Murad II came to Kraków to negotiate an alliance against the Habsburgs of Austria, who had taken over Hungary. This failed to materialise, since Władysław III took Hungary himself and proceeded to make war on Turkey over Moldavia, a war which cost him his life at the Battle of Varna. Eighty years later, in 1526, Louis Jagiellon, also King of Hungary, was to lose his life in the same way. He was trampled to death in a muddy stream at the Battle of Mohacs, fighting against Suleiman the Magnificent over a Hungary which passed to Ferdinand of Habsburg after the battle.
The feud with Muscovy was equally pointless. After the Tatar invasions, the Lithuanian dukes had occupied the remains of Kievan Rus. The remaining Russian principalities were too weak to think of anything but survival, but with time Muscovy began to nurture ambitions. After the fall of Constantinople in 1453 the princes of Muscovy, who were linked by marriage to the Byzantine Emperors, declared their city to be Constantinople’s successor, the ‘Third Rome’, protector of the Eastern Catholic Faith, and spiritual mother of all the Russias—most of which were under Lithuanian dominion. In the fifteenth century, Poland and Lithuania could afford to ignore such posturing. Apart from their own strength, they could count on the Tatar Golden Horde to keep Muscovy in check. In the latter part of the century, however, the Golden Horde went into decline, and its stranglehold over Muscovy was broken.