The Scottish Green Party originated as the Scottish branch of the Ecology Party, founded in 1978 by Leslie Spoor. The Ecology Party became the UK Green Party and it remained a constituent party until 1990, when the Scottish Green Party became a separate entity. The separation was entirely amicable, as part of the green commitment to decentralisation: the Scottish Green Party supported the referendum on Scottish independence and opposed Britain's entry into the European Common Market in its 1989 European election manifesto, claiming that the Common Market would cause mass unemployment for Scottish workers, force Scotland to move towards a tourist-based economy, enable the destruction of local food markets and cause catastrophic environmental damage – for this reason, the party campaigned for a Europe-wide confederation of individuals on global issues affecting the environment.