"In 1603 King James VI of Scotland succeeded the childless Queen Elizabeth I on the throne of England as James I. Thereafter, although frequently professing an intimate attachment to their ancient kingdom, both he and his son King Charles I, who succeeded him in 1625, regarded themselves first and foremost as English monarchs. Scotland nevertheless still retained its own parliament, referred to as the Estates, and therefore its own quite separate system of government. Unfortunately, moves initiated by Charles I in 1633 with the aim of bringing both the Scottish church and legal system into line with English practice proved to be a disastrous mistake. In 17th century Britain religion and politics were still inextricably linked, and the monarchy's temporal and religious prerogatives were both the subject of passionate debate among the influential classes. Less than a century beforehand the struggle between Roman Catholic and Protestant had seen religious martyrs burned alive at the stake; and despite Elizabeth's generally successful establishment of the Anglican Protestant church of England created by her father Henry VIII, both her reign and that of James I were intermittently troubled by Roman Catholic conspiracies."