This thinker discussed a "systematic union of different rational beings under common laws" that he called the "Kingdom of Ends" in one work.  
This thinker discussed a "systematic union of different rational beings under common laws" that he called the "Kingdom of Ends" in one work.  He called one of his famous ideas a "fact of nature" in another work.  He attempted to create a "Copernican revolution" in philosophy, and essays by this author include one that defines the title idea as "man's emergence from his self-imposed immaturity."  This author of "What is Enlightenment" defined one concept of morality by discussing maxims that become universal law in his Groundwork of the Metaphysics of Morals.  FTP name this creator of the categorical imperative and wrote the Critique of Pure Reason
This thinker discussed a "systematic union of different rational beings under common laws" that he called the "Kingdom of Ends" in one work.  
kant