[1] George was opposed to tariffs, which were at the time both the major method of protectionist trade policy and an important source of federal revenue.

Like Progress and Poverty, much of the book was devoted to attacking privileges, such as land monopoly, which limit trade and rob value from producers.

[5]In 1997, Spencer MacCallum wrote that Henry George was "undeniably the greatest writer and orator on free trade who ever lived.

[9] Friedman also paraphrased one of George's arguments in favor of free trade: "It’s a very interesting thing that in times of war, we blockade our enemies in order to prevent them from getting goods from us.

In time of peace we do to ourselves by tariffs what we do to our enemy in time of war.”[10] Oswald Garrison Villard said, "Few men made more stirring and valuable contributions to the economic life of modern America than did Henry George,"[11] and that what George had "written about protection and free trade is as fresh and as valuable today as it was at the hour in which it was penned.