IMMUTABLE

not capable of change

not subject or susceptible to change or variation in form or quality or nature
SYN - changeless

"The view of that time was that all species were immutably created by God."

"People that try to claim Aristotle and other ancient Greeks as the first evolutionary theorist, forget that they thought things were rather immutable when it came to the species as a whole."

"The government was set up in such an immutable way that when the times changed and new technologies emerged it had been very inadequate."

"It was this immutable nature in her that he couldn't stand. Didn't she know that everything is change and to not change is to not live."