Kant's "Religion within the Limits of Mere Reason" is one of his most accessible works due to its simplicity and basic lexicon. Here he writes about "the relationship of religion to human nature". Kant strove to fix both the Natural science and Theology by keeping them both in their respective dialectal parameters. Living through the heart of the Enlightenment, Kant observed the Epistemological problems brought about by One-World Newtonian Mechanical Reductionism, and the bad counter-reactions that Protestant apologists made. Like Hegel, Kant wants to restore faith as the "guardian of the speculative mysteries". This Reader's Edition edition contains an Afterword by the translator, a timeline of Kant's life and works, and a helpful index of Kant's key concepts and intellectual rivals. This translation is designed for readability, rendering Kant's enigmatic German into the simplest equivalent possible, and removing the academic footnotes to make this critically important historical text as accessible as possible to the modern reader. In this text, Kant distinguishes between historical or revealed religion, which depends on tradition, ritual, and institutional structures, and pure rational religion. He defines the latter as an internal moral disposition aligned with the idea of a moral lawgiver. Kant interprets Jesus as a symbolic representation of moral perfection rather than a supernatural being. He also interprets the concept of radical evil as the innate human tendency to prioritize self-interest over duty. According to Kant, this condition must be overcome through moral self-reform rather than divine grace. Throughout the four books, Kant argues that true religion stems from cultivating moral character, and that churches are justifiable only if they serve that purpose. This work challenges theological orthodoxy while preserving the ethical core of religious life. It casts faith as an outgrowth of autonomous moral reasoning rather than submission to external authority. This work introduced Kant's controversial doctrine of "radical evil," arguing that human beings possess an innate propensity to subordinate the moral law to self-love, a corruption that is woven into human nature yet remains freely chosen and thus imputable. The book's four parts examined the radical evil inherent in human nature, the battle between good and evil principles for dominion over humanity, the victory of good over evil through founding a Kingdom of God on earth, and the distinction between true service to God through moral action versus false ritualistic observance. Kant positioned himself against Enlightenment optimism and sided with an Augustinian view of human corruption, claiming that while humans possess a natural predisposition to good consisting of animality, humanity, and personality, they also harbor a radical propensity to evil that corrupts the very ground of all maxims, making it inextirpable by human powers alone yet possible to overcome through a revolutionary change in moral disposition. The work embroiled Kant in censorship conflicts when the second part was rejected by King Friedrich Wilhelm II's censor as too theological, leading Kant to arrange publication as a complete book through the Theology Faculty at Jena, an act of insubordination that resulted in a royal order forbidding him to publish or speak publicly about religion until the king's death in 1797. Kant strongly criticized ritual, superstition, and church hierarchy while arguing that Christianity should be understood as a rational religion focused on morality rather than dogmatic belief, reducing true religion to ethics grounded in the categorical imperative and positing that moral law inevitably leads to religion through practical reason's need to envision an ethical commonwealth where adherence to moral duty signifies true devotion to God.