“…However, one of the main explanatory factors is the way changes in language, usually small, accumulate, and amplify across time in space, resulting in this astonishing diversity (Evans and Levinson, 2009;Levinson and Evans, 2010;Bowern and Evans, 2014;Dediu et al, 2017). There are currently many proposals that identify various factors shaping language change, ranging from those internal to language (Lass, 1997;Campbell, 1998;Bowern and Evans, 2014), to demography and population movements (Ostler, 2005;Hua et al, 2019), to environmental and ecological factors (Everett et al, 2016;Bentz et al, 2018), and even to the biology and cognition of the language users Wong et al, 2020). However, this enigma cannot be answered without fully embracing the complexity of language itself, "evolving" and "living" at the interface of biology, cognition, society, and culture (Levinson, 2006;Mufwene et al, 2017).…”