An Enquiry into the Obligations of Christians to Use Means for the Conversion of the Heathens: In Which the Religious State of the Different Nations of the World, the Success of Former Undertakings, and the Practicability of Further Undertakings, Are Considered

"An Enquiry into the Obligations of Christians to Use Means for the Conversion of the Heathens" by William Carey is a theological and missionary treatise written in the late 18th century. This book discusses the moral responsibilities of Christians to actively engage in the conversion of non-Christians, exploring the dire religious state of various nations and examining historical efforts and their effectiveness in spreading Christianity. Through a structured argument, Carey emphasizes the urgency and necessity of missionary work among 'heathens' as an essential duty for believers. In this work, Carey lays out the biblical basis for evangelism, starting with the Great Commission, which he argues remains relevant and compelling for Christians today. He reviews past missionary endeavors and highlights the successes and challenges faced in these undertakings. The latter sections evaluate the present religious state of the world, divided by continent and religion, underscoring the prevalence of paganism and the urgency of action. By combining historical insights with moral imperatives, Carey advocates for a coordinated effort to spread the Gospel, urging Christians not only to pray but also to actively participate in outreach and missionary work to fulfill their divine duty.