What would be the effect on the US if the decision of marnury v. Madison had not validated the supreme court the idea that supreme court has the power to judge whether acts of congress are constitutio?

If Marbury v. Madison had not established the principle of judicial review, the Supreme Court would lack the authority to invalidate unconstitutional laws passed by Congress. This could lead to unchecked legislative power, potentially allowing Congress to enact laws that infringe upon individual rights and liberties. The balance of power among the branches of government would be significantly altered, undermining the system of checks and balances that is fundamental to the U.S. Constitution. Ultimately, the protection of constitutional rights could be weakened, impacting the rule of law in the United States.