This early American enthusiasm for Montessori was short-lived, after the 1914 publication of The Montessori System Examined, a harshly critical booklet by William Heard Kilpatrick, an advocate of John Dewey's theories of education; by 1920, Montessori schools had virtually disappeared from the US.[4] The Montessori-method school resurgence did not occur until after 1960, when Nancy McCormick Rambusch and Margaret Stephenson, who each had worked with Montessori in Europe, separately went to the US.