A comparative study of the literature on party changes shows that there are many different views on why and how parties change. The existing literature is rather theoretical. Most authors have based their model on a survey of a limited number of parties. The only general conclusion one can draw is that both external and internal factors can provoke party changes. In this contribution, we concentrate on the role of the internal factors. We find that change is less likely to happen when the party is divided in several factions. Furthermore the party organisation influences the changes. In highly institutionalised parties changes wil be more difficult than in less organised parties. Finally the role of the party president cannot be neglected. He has to analyse and interpret the external challenges. Only if he thinks that a change is necessary, the party is likely to change. In brief, party change is a dynamic process that is led by the party elite.