Eli5: How do accents come about, like in the uk within 4 miles of each other there could be 5 different accents

Question

Eli5: How do accents come about, like in the uk within 4 miles of each other there could be 5 different accents

In: Other

Answer 1

Isolation. 4 miles is a long distance if there’s a giant mountain range separating the towns. For most of history, people didn’t travel much between communities and therefore accents could “drift”, and become unique.