Random Cracking in Drywall

[JKJohn]

Greeting -

I have been called to inspect cracking in drywall. This is in exterior wall-top level-row house-60 years old.
The cracking is random. The structure does not show any type of movement or stress.

I attached a picture of the drywall.

Any ideas?

BTW, I hope I am posting at the right place.

Thanks,