Simplify the following text for a Grade 15 native English-speaking person.
Original: In 1921 , Otto Neurath , an Austrian social scientist , introduced graphic design in order to facilitate the understanding of various social and economical trends through the creative use of statistical charts .
Simplified: In 1921 , Otto Neurath , an Austrian social scientist , introduced graphic design in order to facilitate the understanding of various social ad economical trends through the creative use of statistical charts .