Who used place value and zero in mathematics

Maya used place value and zero in mathematics.

The Maya civilization was a Mesoamerican civilization developed by the Maya peoples, and prominent for its logosyllabic script, the most sophisticated and highly developed writing system in pre-Columbian Americas, along with  its art, architecture, mathematics, calendar, and astronomical system. The Maya civilization developed in an area that comprised southeastern Mexico, all of Guatemala and Belize, and the western portions of Honduras and El Salvador.

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes