Simplify the following text for a Grade 12 native English-speaking person.
Original: The term `` fundamentalism '' has its roots in the Niagara Bible Conference ( 1878 â `` 1897 ) which defined those tenets it considered fundamental to Christian belief .
Simplified: The term `` fundamentalism '' has its roots in the Niagara Bible Conference ( 1878 â `` 1897 ) which defined those things that were fundamental to Christian belief .