Joseph Addison was an English writer and editor whose essays endorsed pluralism and, in particular the principle of plenitude. In The Spectator of 25 October 1712, having noted the diversity of life on Earth, he wrote:

[I]t seems very probable from the Analogy of Reason, that if no part of Matter, which we are acquainted with, lies waste and useless, those great Bodies which are at such a Distance from us should not be desart and unpeopled, but rather they should be furnished with Beings adapted to their respective Situations.