This paper is a report on the fourth edition of the Touché lab on argument and causal retrieval hosted at CLEF 2023. With the goal of creating a collaborative platform for research on computational argumentation and causality, we organized four shared tasks: (a) argument retrieval for controversial topics (retrieve web documents that contain high-quality argumentation and detect the documents’ stances), (b) causal retrieval (retrieve web documents that contain causal statements and detect the documents’ causal stances), (c) image retrieval for arguments (retrieve images that support a pro or con stance towards some controversial topic), and (d) multilingual multi-target stance classification (detect the stance of comments on proposals from an online multilingual participatory democracy platform).