How do we know that mankind is guilty of returning evil for good?

Romans 1:18-21 clarifies that God's wrath is revealed against all ungodliness because humanity suppresses the truth. Despite the clear evidence of God's power and divine nature, people are ungrateful and fail to honor Him as God. This represents the core of sin—returning evil for good. Adam's original sin exemplifies this universal condition; he had everything in paradise yet chose disobedience, demonstrating a fundamental misunderstanding and rejection of the good that God offered. This pattern persists, as we continually fail to acknowledge the abundant blessings bestowed upon us by our Creator.