Who took calvinist to an extreme?

John Calvin's teachings were further radicalized by figures like Theodore Beza and later by the Puritans, who emphasized strict moral codes and predestination. However, the most extreme manifestation of Calvinism can be seen in the Synod of Dort (1618-1619), which solidified the Five Points of Calvinism, emphasizing total depravity, unconditional election, limited atonement, irresistible grace, and perseverance of the saints. Additionally, the Dutch Reformed Church's influence led to rigid interpretations that sometimes resulted in harsh societal regulations.