Dialecticalization

Caxton noted: "And that comyn englysshe that is spoken in one shire varyeth from a nother."^([sic])¹⁹ But political, social, and technical forces can arrest dialecticalization and impose a standard speech, as tends to occur in large states.

Source: wiktionary

This is a little earlier than we would expect the exodus from the Sahara to have begun, but it is possible that dialecticalization began before the southward migration.

Source: wiktionary

According to everything I've ever read, it is the opposite: English is undergoing a *unification* of dialects, especially between American and British variëties^([sic]). English is growing and diversifying only in capabilities and vocabulary to the extent that is it picking these up, while it is beïng^([sic]) assimilated into the whole of World English too quickly to be a cause for dialecticalization.

Source: wiktionary

Croce also opposed Hegel’s methodical dialecticalization of distinct aspects of reality, individual facts and empirical concepts,¹⁹⁰ not because of the quaint biases it revealed but because Croce was not a universalist like Hegel, only a partial universalist, lacking also the macro-microcosmos motif; and Croce could not support Hegel’s Naturphilosophie and triadic monism because he believed in a spiritualized dualism.¹⁹¹

Source: wiktionary