I've seen themes and elements from Dr. Seuss's Horton Hears a Who applied to a variety of things, such as the abortion debate, dwarfism awareness, and space aliens. While I can see how they could apply to these topics, none of them seem likely to be was Dr. Seuss was intending to talk about. But the book, like many of the author's other works, is apparently meant to convey a message.

What message was Dr. Seuss intending to express in Horton Hears a Who?