A devolved Scottish Assembly that would have some form of legislative powers in jurisdiction over Scotland was a long-held political priority for many individuals and organisations. The drive for home rule first took concrete shape in the nineteenth century, as demands for it in Ireland were met with similar (although not as widespread) demands in Scotland.

In 1853 the National Association for the Vindication of Scottish Rights was established. This body was close to the Conservative Party and was motivated by a desire to secure more focus on Scottish problems in repsonse to what they felt was undue attention being focused on Ireland by the then Liberal government.

This body was concerned with increasing the attention that Scotland was receiving and did not advocate legislative devolution in the form of an assembly as such, but nevertheless, it marked the beginning of a political focus on Scotland.

Shortly after this, the Liberals began to commit to home rule. In 1871, William Gladstone stated at a meeting held in Aberdeen that if Ireland was to be granted home rule, then the same should apply to Scotland. In 1885 the post of Secretary of State for Scotland was re-established as the demands for greater political focus on Scotland grew. In the following year Gladstone introduced a home rule bill for Ireland helping to prompt the formation of the Scottish Home Rule Association, a nominally non-partisan political organisation, but actually closely tied with the Liberals, which aimed for the establishment of an assembly.

From 1895 to 1905 the Tories were in power and home rule did not feature as part of their plans. However, the return of a Liberal government in 1906 gave great hope to those seeking an assembly, as the Liberals were officially committed to the idea. But it did not feature as an immediate priority of government, and by the time a Scottish home rule bill was presented to the Westminster Parliament in 1913, the legislative process to pass it was interupted by the First World War.

After the war a second Scottish Home Rule Association was formed (the first had fallen into inactivity). This was driven not only by Liberals but also by those involved in the growing Labour Party and the Independent Labour Party in particular. The Labour Party, formed in 1906, was formally committed to establishing an assembly for Scotland and this seemed to increase prospects for home rule.

The demands for political change in the way in which Scotland was run changed dramatically in the 1920s when Scottish nationalists started to form various organisations. The Scots National League was formed in 1920 in favour of Scottish independence, and this movement was superseded in 1928 by the formation of the National Party of Scotland, which became the Scottish National Party (SNP) in 1934.

At first the SNP sought only the establishment of a devolved Scottish assembly, but in 1942 they changed this to support all-out independence. This caused the resignation of John MacCormick from the SNP and he formed the Scottish Covenant Association. This body proved to be the biggest mover in favour of the formation of a Scottish assembly, collecting over two million signatures in the late 1940s and early 1950s and attracting support from across the political spectrum. However, without formal links to any of the political parties it withered, and devolution and the establishment of an assembly were put on the political back burner.

However, by the 1960s the SNP's support was growing. The unionist parties responded by committing themselves to supporting devolution. The Labour government formed the Kilbrandon Commission to draw up devolution plans, and Ted Heath committed the Tories to supporting some form of devolution at the 1968 Tory Conference in Perth (commonly known as his Declaration of Perth).

However the SNP had a disappointing result in the 1970 general election, and for the first part of the 1970s devolution under Heath's government was off the cards. But significant SNP advances in the general elections in 1974 brought the issue to the fore again.

In 1978 the Labour government passed the Scotland Act which legislated for the establishment of a Scottish Assembly, provided the Scots voted for such in a plebiscite. However, the Labour Party was bitterly divided on the subject of devolution. Despite officially favouring it, vast numbers of members opposed the establishment of an assembly, and this division caused the failure to reach the required 40% of the electorate voting in favour of an assembly (that itself was a quota only added to the Scotland Act by an amendment proposed by a Labour MP).

The ensuing general election in 1979 proved electorally disastrous for both Labour and the SNP, and it seemed that the prospects for a Scottish Assembly were remote. However, in the early 1980s a number of Labour Party and SNP members decided to form the Campaign for a Scottish Assembly, which pamphleteered and lobbied for devolution. This campaign, combined with growing resentment at the fact that despite a majority of Scots voting against the Tories they were forming their government, increased demands for the establishment of a devolved Scottish Assembly.

In 1989 the Scottish Constitutional Convention was formed encompassing the Labour Party and the Lib-Dems as well as other parties, local authorities, and huge sections of "civic Scotland". Its purpose was to devise a scheme for the formation of a devolution settlement for Scotland. Suddenly the prospects for a Scottish Assembly seemed much brighter, despite the fact the SNP decided not to take part as they felt that independence would not be a constitutional option countenanced by the convention.

The convention produced its final report in 1995 and, with the return of a Labour government in 1997, devolution seemed assured. Later that year the Scottish people voted overwhelmingly in favour of establishing the devolved Scottish Parliament in a referendum, and the first elections for that body took place in 1999.

Despite the institution being called a "parliament", to all intents and purposes it is the same sort of legislative body as an assembly, as it does not have parliamentary sovereignty: if it so desired, the Westminster Parliament could overrule the Scottish Assembly (by amending the Scotland Act that details its powers) or abolish it altogether; therefore it does not fit the definition of a Parliament.