Edgar W. Schneider's dynamic model of postcolonial Englishes adopts an evolutionary perspective [1] emphasizing language ecologies.
It shows how language evolves as a process of 'competition-and-selection', and how certain linguistic features emerge.
[2] The Dynamic Model illustrates how the histories and ecologies will determine language structures in the different varieties of English, and how linguistic and social identities are maintained.
[3] Five underlying principles underscore the Dynamic Model:[4] The Dynamic Model outlines five major stages of the evolution of world Englishes.
These stages will take into account the perspectives of the two major parties of agents – settlers (STL) and indigenous residents (IDG).