Which theologian attracted Protestant followers through his teachings?

John Calvin is widely recognized for attracting Protestant followers through his influential teachings, particularly in the context of the Reformation. His work went beyond that of Martin Luther, as Calvin established a distinctly structured Christian doctrine centered on predestination, the sovereignty of God, and a systematic theology that emphasized the authority of scripture. His writings, like "Institutes of the Christian Religion," provided a comprehensive framework for Protestant beliefs and practices that resonated with many during the Reformation.

Calvin's establishment of a theocratic government in Geneva also served as a model for other Protestant communities, particularly in Switzerland and France. This system and his emphasis on community discipline attracted many to his version of Protestantism, leading to a substantial following that continues to exist today. His influence resulted in numerous Calvinist groups forming across Europe, significantly shaping Protestant thought, especially among the Reformed churches.

While Martin Luther also played a crucial role in the Protestant Reformation, Calvin's specific theological innovations and organizational strategies significantly expanded the reach and impact of Protestantism.