Positioned on the centre-right of the British political spectrum, the Conservative Party is ideologically conservative. Various factions have dominated the party at different times, including one nation conservatives, Thatcherites, liberal conservatives and conservative liberals. Furthermore, there are influential factions of social conservatives and eurosceptics. While its views and policies have changed throughout its history, the party has generally adopted liberal economic policies favouring free market economics including measures such as deregulation, privatisation, and marketisation since the 1980s, although the party also historically advocated for protectionism. The party is British unionist, opposing Irish reunification, Scottish and Welsh independence, and has been critical of devolution. Historically, the party supported the continuance and maintenance of the British Empire. The party has taken various approaches towards policy on the European Union (EU). There are eurosceptic and, to an increasingly lesser extent, pro-European factions of the party. In recent years, the party has embraced a strongly eurosceptic position, with the party adopting the slogan "Get Brexit Done" following the decision to leave the EU in a referendum held under the Conservative Cameron government. On social policy, it has historically taken a more socially conservative approach including implementing Section 28 and generally maintaining Sunday blue laws. However, some argue that its social policy has become more liberal in recent decades, perhaps evidenced best by the legalisation of same-sex marriage by the Conservative–Liberal Democrat coalition government in 2014. In defence policy, it favours a strong military capability including an independent nuclear weapons programme and commitment to NATO membership.