Poland (W)

The 1569 Union of Lublin established the Polish–Lithuanian Commonwealth, a more closely unified federal state with an elective monarchy, but which was governed largely by the nobility, through a system of local assemblies with a central parliament. The Warsaw Confederation (1573) guaranteed religious freedom for the Polish nobility (szlachta) and townsfolk (mieszczanie). However, the peasants (chłopi) were still subject to severe limitations imposed on them by the nobility. The establishment of the Commonwealth coincided with a period of stability and prosperity in Poland, with the union thereafter becoming a European power and a major cultural entity, occupying approximately one million square kilometers of Central and Eastern Europe, as well as an agent for the dissemination of Western culture through Polonization into areas of modern-day Lithuania, Ukraine, Belarus and Western Russia.

In the 16th and 17th centuries, Poland suffered from a number of dynastic crises during the reigns of the Vasa kings Sigismund III and Władysław IV and found itself engaged in major conflicts with Russia, Sweden and the Ottoman Empire, as well as a series of minor Cossack uprisings. In 1610, a Polish army under command Hetman Stanisław Żółkiewski seized Moscow after winning the Battle of Klushino. In 1611, the Tsar of Russia paid homage to the King of Poland.

After the signing of Truce of Deulino, Poland had in the years 1618-1621 an area of about 1 million km2 (390,000 sq mi).

From the middle of the 17th century, the nobles' democracy, suffering from internal disorder, gradually declined, thereby leaving the once powerful Commonwealth vulnerable to foreign intervention. Starting in 1648, the Cossack Khmelnytsky Uprising engulfed the south and east, eventually leaving Ukraine divided, with the eastern part, lost by the Commonwealth, becoming a dependency of the Tsardom of Russia. This was followed by the 'Deluge', a Swedish invasion of Poland, which marched through the Polish heartlands and ruined the country's population, culture and infrastructure—around four million of Poland's eleven million inhabitants died in famines and epidemics throughout the 17th century. However, under John III Sobieski the Commonwealth's military prowess was re-established, and in 1683 Polish forces played a major role in the Battle of Vienna against the Ottoman Army, commanded by Kara Mustafa, the Grand Vizier of the Ottoman Empire.

Sobieski's reign marked the end of the nation's golden era. Finding itself subjected to almost constant warfare and suffering enormous population losses as well as massive damage to its economy, the Commonwealth fell into decline. The government became ineffective as a result of large-scale internal conflicts (e.g. Lubomirski Rebellion against John II Casimir and rebellious confederations) and corrupted legislative processes. The nobility fell under the control of a handful of magnats, and this, compounded with two relatively weak kings of the Saxon Wettin dynasty, Augustus II and Augustus III, as well as the rise of Russia and Prussia after the Great Northern War only served to worsen the Commonwealth's plight. Despite this The Commonwealth-Saxony personal union gave rise to the emergence of the Commonwealth's first reform movement, and laid the foundations for the Polish Enlightenment.

During the later part of the 18th century, the Commonwealth made attempts to implement fundamental internal reforms; with the second half of the century bringing a much improved economy, significant population growth and far-reaching progress in the areas of education, intellectual life, art, and especially toward the end of the period, evolution of the social and political system. The most populous capital city of Warsaw replaced Gdańsk (Danzig) as the leading centre of commerce, and the role of the more prosperous townsmen increased.