प्रारंभिक बौद्ध परंपराओं के अनुसार, बुद्ध 'सामाजिक दुनिया' को किसकी रचना मानते थे?

The Vaibhashika and Sautrantika philosophical schools belong primarily to which major branch of Buddhism?

Who presided over the Fourth Buddhist Council held at Kundalvana in Kashmir during the reign of Kanishka?

What did the term 'Upasampada' signify in Buddhist monastic tradition?