From the article: "...here is a brief overview of 5 of the 20th century’s most important educational theorists. Their influence can still be felt today, both in how we view the educational system and the educational process. As is the case with most theories, these individuals’ work has been adopted, refuted, tweaked, and ignored to varying degrees.
Implied here, of course, is that knowing both the history of education and theories of education are important. The case for the former is made best, arguably, by George Santayana: 'Those who cannot learn from history are doomed to repeat it.'"