Unbalanced social-ecological acceleration led to state formation failure in early medieval Poland. - Izdebski, Adam; Czerwiński, Sambor; Jankowiak, Marek; Danielewski, Marcin; Fiołna, Sabina; Gromig, Raphael; Guzowski, Piotr; Haghipour, Negar; Hajdas, Irka; Kołaczek, Piotr; Lamentowicz, Mariusz; Marcisz, Katarzyna; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2025)