The concept of 'explanation' has attracted considerable attention in the social sciences, and particularly within political science. However, scholars are not always familiar with what explaining political phenomena means, let alone with what it entails for developing sound causal arguments. This article introduces Craig Parsons' typology of explanation before assessing its value for the causal analysis of political behaviour and processes. As argued, despite its limitations, this typology clearly maps four types of explanation in political science (institutional, ideational, structural and psychological) while helping scholars to combine them more rigorously when needed. This is why Parsons' typology has the potential to move political scientists to the 'next level' as far as 'explanation' is concerned.Explanation occupies a central position within the hierarchy of tasks performed by social scientists. Indeed, a significant part of their work involves trying to explain political phenomena. However, social scientists rarely reflect upon what 'explanation' means and how they should apply the concept in their research. The purpose of this article is to discuss the importance of explanation within political science, 1 to present a promising typology of political explanation by Craig Parsons that is based on four types of explanation (institutional, ideational, structural and psychological), and to assess its value for the discipline.