To what extent do you think sociological triggers lead to language change?And give examples for illustration.

To what extent do you think sociological triggers lead to language change?And give examples for illustration.

Linguists have become increasingly aware of sociological triggers for language change.
Radical socio-political changes such as wars,invasions,occupation,colonialization,and language planning and standardization policies lead to vigorous language changes.
A typical example in the history of English is the Norman Conquest,a military event that marked the dawning of the Middle English period.