What is the most convincing explanation for the success (or failure) of green parties in Europe - Value change, party strategy or institutions

Essay from the year 2005 in the subject Politics - Political systems in general and in comparison, grade: 1,3, University of Nottingham (School of Politics and International Relations), course: Politics and Society in Europe, a comparative approach, language: English, abstract: The emergence of Green parties towards the end of the 1970s was asignificant turning point in the development of party sy...