Monolithic

ˌmɒnəˈlɪθɪk

adjective

formed of a single large block of stone; relating to a very large organization that does not allow individuality or change

The term 'monolithic' is often used to describe something massive, uniform, or unchanging, like a large stone structure or a rigid organization that doesn't easily adapt to new ideas or diversity.

He shook his head to drive out the angry thoughts, glanced back at the field where five of his own frigates were posted around the rim like monolithic sentries.

Herbert, Frank

Dune

"In the wrong hands," Leto said, "monolithic centralized power is a dangerous and volatile instrument."

Frank Herbert

God Emperor of Dune

'Well, I'll be damned,' mumbled General Dreedle, and his ruddy monolithic face softened with amusement.

Heller, Joseph

Catch-22