Kingdom of Ends
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The Kingdom of Ends is a thought experiment centered around the moral philosophy of Immanuel Kant. Kant introduced the concept in his Groundwork of the Metaphysic of Morals (4:439). The thought experiment proposes a world in which all human beings are treated as ends, not as means to an end for other people.
The nature of the concept
The Kingdom of Ends is a hypothetical state of existence that is derived from Kant's categorical imperative. A Kingdom of Ends is composed entirely of rational beings, whom Kant defines as those capable of moral deliberation (though his definition expands in other areas). In order to be a part of the Kingdom of Ends, these rational beings must choose to act by maxims that imply an absolute necessity. It is from this point of view that they must judge themselves and their actions.[clarification needed]
Kant uses the term "kingdom" to mean the "union of different rational beings in a system by common laws." These common laws, established by the categorical imperative, are the gauge used to evaluate the worthiness of an individual's actions. When all the kingdom's individuals live by the categorical imperative—particularly Kant's second formulation of it—one will treat each of their fellow subjects as ends in themselves, instead of means to achieving one's own selfish goals. This systematic whole is the Kingdom of Ends.
People can only belong to the Kingdom of Ends when they give universal laws unto it, and are subject to those same laws and all laws within. Such rational beings must regard themselves simultaneously as sovereign when making laws, and as subject when obeying them. Morality, therefore, is acting out of reverence for all universal laws which make the Kingdom of Ends possible. In a true Kingdom of Ends, acting virtuously will be rewarded with happiness.
In his writings on religion, Kant interprets the Kingdom of God as a religious symbol for the moral reality of the Kingdom of Ends. As such, it is the ultimate goal of both religious and political organization of human society. 
- Stephen Palmquist"'The Kingdom of God is at Hand!' (Did Kant really say that?)", History of Philosophy Quarterly 11:4 (October 1994), pp.421-437.