Simplify the following text for a Grade 10 native English-speaking person.
Original: The term was popularized by the `` The Fundamentals '' , a collection of twelve books on five subjects published in 1910 and funded by Milton and Lyman Stewart This series of essays came to be representative of the `` Fundamentalist-Modernist Controversy '' which appeared late in the 19th century within some Protestant denominations in the United States , and continued in earnest through the 1920s .
Simplified: The term was also used to describe `` The Fundamentals '' , a collection of twelve books on five subjects published in 1910 and funded by Milton and Lyman Stewart