Mark Twain is remembered most for his wit. But what he wrote was generally allegorical even in its simple humor.
Many of his more critical writings are contained in a small volume with this name. I’ve also found an interesting Twain site maintained by Jim Zwick. There is a great deal on Twain regarding his views opposing imperialism. At the time, the US was on an imperialist quest, especially in regards to Spanish possessions around the world.
After being accused of being a traitor by Dr. Van Fleet prior to a speech, Twain replied he had been “criticized by better men before Dr. Van Fleet was born.”
The site has much to recommend it. Including Sam’s entry into this year’s Presidential race as a third party candidate.