The irony of your comment is very entertaining. Notwithstanding your blatant ignorance of Twain's own words/disclaimers found in the very essay you critique, you nonetheless lambast the "collectivist" tone of his essay. But then, after all of that, you end with this hypocritical gem!
Humans are screwed-up, but unlike animals, we're able to realize it and turn against our immorality.
In summary: You accuse Twain of collectivist thinking, then summarize your accusations with your own collectivist conclusions!