The idea of people forming large groups or factions to advocate for their shared interests is ancient. Plato mentions the political factions of Classical Athens in the Republic, and Aristotle discusses the tendency of different types of government to produce factions in the Politics. Certain ancient disputes were also factional, like the Nika riots between two chariot racing factions at the Hippodrome of Constantinople. However, modern political parties are considered to have emerged around the end of the 18th or early 19th centuries, appearing first in Europe and the United States. What distinguishes political parties from factions and interest groups is that political parties use an explicit label to identify their members as having shared electoral and legislative goals. The transformation from loose factions into organised modern political parties is considered to have first occurred in either the United Kingdom or the United States, with the United Kingdom's Conservative Party and the Democratic Party of the United States both frequently called the world's first modern political party.
Emergence in Britain
The party system that emerged in early modern Britain is considered to be one of the world's first, with origins in the factions that emerged from the Exclusion Crisis and Glorious Revolution of the late 17th century.:4 The Whig faction originally organised itself around support for protestant constitutional monarchy as opposed to absolute rule, whereas the conservative Tory faction (originally the Royalist or Cavalier faction of the English Civil War) supported a strong monarchy.:4 These two groups structured disputes in the politics of the United Kingdom throughout the 18th century. Throughout the next several centuries, these loose factions began to adopt more coherent political tendencies and ideologies: the liberal political ideas of John Locke and the notion of universal rights espoused by theorists like Algernon Sidney and later John Stuart Mill were major influences on the Whigs, whereas the Tories eventually came to be identified with conservative philosophers like Edmund Burke.
The period between the advent of factionalism around the Glorious Revolution and the accession of George III in 1760 was characterised by Whig supremacy, during which the Whigs remained the most powerful bloc and consistently championed constitutional monarchy with strict limits on the monarch's power, opposed the accession of a Catholic king, and believed in extending toleration to nonconformist Protestants and dissenters. Although the Tories were out of office for half a century, they largely remained a united opposition to the Whigs.
When they lost power, the old Whig leadership dissolved into a decade of factional chaos with distinct Grenvillite, Bedfordite, Rockinghamite, and Chathamite factions successively in power, and all referring to themselves as "Whigs". The first distinctive political parties emerged from this chaos. The first such party was the Rockingham Whigs under the leadership of Charles Watson-Wentworth and the intellectual guidance of the political philosopher Edmund Burke. Burke laid out a philosophy that described the basic framework of the political party as "a body of men united for promoting by their joint endeavours the national interest, upon some particular principle in which they are all agreed". As opposed to the instability of the earlier factions, which were often tied to a particular leader and could disintegrate if removed from power, the party was centred around a set of core principles and remained out of power as a united opposition to government.
In A Block for the Wigs
(1783), James Gillray
caricatured Fox's return to power in a coalition with North. George III is the blockhead in the centre.
A coalition including the Rockingham Whigs, led by the Earl of Shelburne, took power in 1782, only to collapse after Rockingham's death. The new government, led by the radical politician Charles James Fox in coalition with Lord North, was soon brought down and replaced by William Pitt the Younger in 1783. It was now that a genuine two-party system began to emerge, with Pitt leading the new Tories against a reconstituted "Whig" party led by Fox. The modern Conservative Party was created out of these Pittite Tories. In 1859 under Lord Palmerston, the Whigs, heavily influenced by the classical liberal ideas of Adam Smith, joined together with the free trade Tory followers of Robert Peel and the independent Radicals to form the Liberal Party.
Emergence in the United States
Although the framers of the 1787 United States Constitution did not anticipate that American political disputes would be primarily organised around political parties, political controversies in the early 1790s over the extent of federal government powers saw the emergence of two proto-political parties: the Federalist Party and the Democratic-Republican Party, which were championed by Alexander Hamilton and Thomas Jefferson, respectively. However, a consensus reached on these issues ended party politics in 1816 for nearly a decade, a period commonly known as the Era of Good Feelings.
The splintering of the Democratic-Republican Party in the aftermath of the contentious 1824 presidential election led to the re-emergence of political parties. Two major parties would dominate the political landscape for the next quarter-century: the Democratic Party, led by Andrew Jackson, and the Whig Party, established by Henry Clay from the National Republicans and from other Anti-Jackson groups. When the Whig Party fell apart in the mid-1850s, its position as a major U.S. political party was filled by the Republican Party.
Another candidate for the first modern party system to emerge is that of Sweden. Throughout the second half of the 19th century, the party model of politics was adopted across Europe. In Germany, France, Austria and elsewhere, the 1848 Revolutions sparked a wave of liberal sentiment and the formation of representative bodies and political parties. The end of the century saw the formation of large socialist parties in Europe, some conforming to the philosophy of Karl Marx, others adapting social democracy through the use of reformist and gradualist methods.
At the same time, the Home Rule League Party, campaigning for Home Rule for Ireland in the British Parliament, was fundamentally changed by the Irish political leader Charles Stewart Parnell in the 1880s. In 1882, he changed his party's name to the Irish Parliamentary Party and created a well-organized grassroots structure, introducing membership to replace ad hoc informal groupings. He created a new selection procedure to ensure the professional selection of party candidates committed to taking their seats, and in 1884 he imposed a firm 'party pledge' which obliged MPs to vote as a bloc in parliament on all occasions. The creation of a strict party whip and a formal party structure was unique at the time. His party's efficient structure and control contrasted with the loose rules and flexible informality found in the main British parties, and represented the development of new forms of party organisation.