There was a time when leading American politicians were proud to proclaim their willingness to tax the wealthy, not just to raise revenue, but to limit excessive concentration of economic power. It is important," said Theodore Roosevelt in 1906, "to grapple with the problems connected with the amassing of enormous fortunes" - some of them, he declared, "swollen beyond all healthy limits." Today we are once again living in an era of extraordinary wealth concentrated in the hands of a few people, with the net worth of the wealthiest 0.1 percent of Americans almost equal to that of the bottom 90 percent combined. Elizabeth Warren has released an impressive proposal for taxing extreme wealth. The Warren proposal would impose a 2 percent annual tax on an individual household's net worth in excess of $50 million, and an additional 1 percent on wealth in excess of $1 billion. The proposal was released along with an analysis by Emmanuel Saez and Gabriel Zucman of Berkeley, two of the world's leading experts on inequality. Saez and Zucman found that this tax would affect only a small number of very wealthy people - around 75,000 households. But because these households are so wealthy, it would raise a lot of revenue, around $2.75 trillion over the next decade. The usual suspects are ... already comparing Warren to Nicols Maduro or even Joseph Stalin, despite her actually being more like Teddy Roosevelt or, for that matter, Dwight Eisenhower. But public opinion surveys show overwhelming support for raising taxes on the rich. One recent poll even found that 45 percent of self-identified Republicans support Alexandria Ocasio-Cortez's suggestion of a top rate of 70 percent.