Simplify the following text for a Grade 10 native English-speaking person.
Original: Mazdak was the chief representative of a religious and philosophical teaching called Mazdakism , which he viewed as a reformed and purified version of Zoroastrianism , although his teaching has been argued to display influences from Manichaeism as well .
Simplified: He was the main representative of set of religious and philiosopical teachings called Mazdakism , which are seen as a reformed version of Zoroastrianism . Some people have argued , his teachings show influences from Manichaeism as well .