Stephen C. Levinson is co-director of the Max Planck Institute for Psycholinguistics, and Professor of Comparative Linguistics at Radboud University Nijmegen. His research focusses on language diversity and its implications for theories of human cognition. He is the author of over 300 publications. Sarah Cutfield is Visiting Fellow, Linguistics at the Australian National University. Her specialties are descriptive and typological linguistics, sociolinguistics, linguistic anthropology, language documentation, Australian Aboriginal languages, creole languages, language ideology and identity. Michael J. Dunn is Professor of General Linguistics at Uppsala Universitet, Sweden since 2014. His academic background is in language description, linguistic typology, and phylogenetics, and his current research focus is on the evolutionary dynamics of language change. N. J. Enfield is Professor of Linguistics at The University of Sydney. He is head of a Research Excellence Initiative on The Crisis of Post-Truth Discourse. His research on language, culture, cognition and social life is based on long term field work in mainland Southeast Asia, especially Laos. Sérgio Meira is a researcher at Museu Paraense Emilio Goeldi, Bélem. He specializes in the Cariban and Tupian language families of lowland South America and in the Tiriyó language in particular.