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