James VI of Scotland in the context of "Succession to Elizabeth I"

The Kingdom of Scotland was a sovereign state in northwest Europe, traditionally said to have been founded in 843. Its territories expanded and shrank, but it came to occupy the northern third of the island of Great Britain, sharing a land border to the south with the Kingdom of England. During the Middle Ages, Scotland engaged in intermittent conflict with England, most prominently the Wars of Scottish Independence, which saw the Scots assert their independence from the English. Following the annexation of the Hebrides and the Northern Isles from Norway in 1266 and 1472 respectively, and the capture of Berwick by England in 1482, the territory of the Kingdom of Scotland corresponded to that of modern-day Scotland, bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the southwest.

In 1603, James VI of Scotland became King of England, joining Scotland with England in a personal union. In 1707, during the reign of Queen Anne, the two kingdoms were united to form the Kingdom of Great Britain under the terms of the Acts of Union. The Crown was the most important element of Scotland's government. The Scottish monarchy in the Middle Ages was a largely itinerant institution, before Edinburgh developed as a capital city in the second half of the 15th century. The Crown remained at the centre of political life and in the 16th century emerged as a major centre of display and artistic patronage, until it was effectively dissolved with the 1603 Union of Crowns. The Scottish Crown adopted the conventional offices of western European monarchical states of the time and developed a Privy Council and great offices of state. Parliament also emerged as a major legal institution, gaining an oversight of taxation and policy, but was never as central to the national life. In the early period, the kings of the Scots depended on the great lords—the mormaers and toísechs—but from the reign of David I, sheriffdoms were introduced, which allowed more direct control and gradually limited the power of the major lordships.

The Kingdom of Great Britain, officially Great Britain, was a sovereign state in Western Europe from 1707 to the end of 1800. The state was created by the 1706 Treaty of Union and ratified by the Acts of Union 1707, which united the Kingdom of England (including Wales) and the Kingdom of Scotland to form a single kingdom encompassing the whole island of Great Britain and its outlying islands, with the exception of the Isle of Man and the Channel Islands. The unitary state was governed by a single parliament at the Palace of Westminster, but the distinct legal systems—English law and Scots law—remained in use, as did distinct educational systems and religious institutions, namely the Church of England and the Church of Scotland remaining as the national churches of England and Scotland respectively.

The formerly separate kingdoms had been in personal union since the Union of the Crowns in 1603 when James VI of Scotland became King of England and King of Ireland. Since the reign of James, who had been the first to refer to himself as "king of Great Britain", a political union between the two mainland British kingdoms had been repeatedly attempted and aborted by both the Parliament of England and the Parliament of Scotland. Queen Anne (r. 1702–1714) did not produce a clear Protestant heir and endangered the line of succession, with the laws of succession differing in the two kingdoms and threatening a return to the throne of Scotland of the Roman Catholic House of Stuart, exiled in the Glorious Revolution of 1688.

The Acts of Union refer to two acts of Parliament, one by the Parliament of Scotland in March 1707, followed shortly thereafter by an equivalent act of the Parliament of England. They put into effect the international Treaty of Union agreed on 22 July 1706, which politically joined the Kingdom of England and Kingdom of Scotland into a single "political state" named Great Britain, with Queen Anne as its sovereign. The English and Scottish acts of ratification took effect on 1 May 1707, creating the new kingdom, with its parliament based in the Palace of Westminster.

The two countries had shared a monarch since the "personal" Union of the Crowns in 1603, when James VI of Scotland inherited the English throne from his cousin Elizabeth I to become (in addition) 'James I of England', styled James VI and I. Attempts had been made to try to unite the two separate countries, in 1606, 1667, and in 1689 (following the Glorious Revolution in 1688, and subsequent deposition of James II of England by his daughter Mary and her husband William of Orange), but it was not until the early 18th century that both nations via separate groups of English and Scots Royal Commissioners and their respective political establishments, came to support the idea of an international "Treaty of political, monetary and trade Union", albeit for different reasons.

The House of Stuart, originally spelt Stewart, also known as the Stuart dynasty, was a royal house of Scotland, England, Ireland and later Great Britain. The family name comes from the office of High Steward of Scotland, which had been held by the family progenitor Walter fitz Alan (c. 1150). The name Stewart and variations had become established as a family name by the time of his grandson Walter Stewart. The first monarch of the Stewart line was Robert II; he and his descendants were monarchs of Scotland from 1371 and of England, Ireland and Great Britain from 1603, until 1714. Mary, Queen of Scots (r. 1542–1567), was brought up in France where she adopted the French spelling of the name Stuart.

In 1503, James IV married Margaret Tudor, thus linking the reigning royal houses of Scotland and England. Margaret's niece, Elizabeth I of England died without issue in 1603, and James IV's and Margaret's great-grandson James VI of Scotland acceded to the thrones of England and Ireland as James I in the Union of the Crowns. The Stuarts were monarchs of Britain and Ireland and its growing empire until the death of Queen Anne in 1714, except for the period of the Commonwealth between 1649 and 1660.

The Union of the Crowns (Scottish Gaelic: Aonadh nan Crùintean; Scots: Union o the Crouns) was the accession of James VI of Scotland to the thrones of England and Ireland as James I on 24 March 1603, and the consequent formation of a personal union between the Kingdoms of England, Scotland, and Ireland. It followed the death of James's cousin, Elizabeth I of England, the last monarch of the Tudor dynasty.

England, Scotland, and Ireland remained separate states with separate parliaments until the Acts of Union of 1707 united England and Scotland into a unitary Kingdom of Great Britain; Ireland retained a legally separate Crown and Parliament, albeit as a practical dependency, until 1801. However, there was a republican interregnum in the 1650s, during which the Tender of Union of Oliver Cromwell created the Commonwealth of England and Scotland, which ended with the Stuart Restoration.

Charles I (19 November 1600 – 30 January 1649) was King of England, Scotland, and Ireland from 27 March 1625 until his execution in 1649.

Charles was born into the House of Stuart as the second son of King James VI of Scotland. After his father inherited the English throne in 1603, he moved to England, where he spent much of the rest of his life. He became heir apparent to the kingdoms of England, Scotland, and Ireland in 1612 upon the death of his elder brother, Henry Frederick, Prince of Wales. An unsuccessful and unpopular attempt to marry him to Infanta Maria Anna of Spain culminated in an eight-month visit to Spain in 1623 that demonstrated the futility of the marriage negotiation. Two years later, shortly after his accession, he married Henrietta Maria of France.