How did different accents come about?

Question

For example, the american, english, and australian accents are all very diverse from one another. How did this happen?

Answer 1

When you separate groups from each other many changes occur; culture, beliefs, mentalities, and the way of speaking being the biggest ones.
This is why there's even different accents within countries as well.

Answer 2

kids havin fun

Answer 3

God, tower of bable..... read bible!