What future for cognitive science(s)?

In this introduction to the thematic issue on the future of the cognitive science(s), we examine how challenges and uncertainties surrounding the past and present of this discipline make it difficult to chart its future. We focus on two main questions. The first is whether cognitive science is a single unified field or inherently pluralistic. This question can be asked at various levels: First, with respect to the disciplines that should be included in the cognitive hexagon and their reciprocal relationships: should we speak of cognitive science or of the cognitive sciences? Second, with regard to the conceptual and methodological changes (turns or revolutions) that have taken place within the cognitive project from its inception to the present day. Third, it pertains to cognitive psychology as a discipline. Before the emergence of cognitive science psychology was a fragmented discipline characterized by different traditions and approaches: has cognitive science been able to stem this fragmentation? Finally, we can question the unity of the cognitive architecture itself: is cognition produced by homogeneous or heterogenous mechanisms for information processing? We show that the issue of unity is addressed by several of the papers included in this thematic issue. In the second part of this introduction, we query the role that each component discipline should play in the cognitive project and in particular which should lead the project going forward, and why. Again, we show how this issue has been tackled by several articles featured in this collection.