बौद्ध धर्म ने समाज के किन दो वर्गों को अपने साथ जोड़कर उन पर एक महत्वपूर्ण सामाजिक प्रभाव छोड़ा था?

In Ancient Indian Statecraft, Kautilya's 'Rajamandala' theory primarily deals with:

The First Buddhist Council was held at ______.

Which ancient Indian text contains references indicating that population counts or census-like records were maintained in ancient India?