 In order to propose it, he combined linguistics (especially sinology), moral and legal philosophy, management, economics, and politics.Leibniz devoted considerable intellectual and diplomatic effort to what would now be called ecumenical endeavor, seeking to reconcile first the Roman Catholic and Lutheran churches, and later the Lutheran and Reformed churches.In this respect, he followed the example of his early patrons, Baron von Boyneburg and the Duke John Frederickboth cradle Lutherans who converted to Catholicism as adultswho did what they could to encourage the reunion of the two faiths, and who warmly welcomed such endeavors by others.