One key political message of the english civil war was that

The main political message of the Civil War was that any English monarch can no longer govern without the consent of Parliament. Overall, the war brought a lot of results but the main events were the execution of Charles I, the exile of his son, and the replacement of the English monarchy. 

No ruler can claim absolute power and ignore the rule of law.

Explanation:

answer; /// i believe the correct answer is general act charters;