Step 1: Understanding the Concept:
The question asks to identify the founding document of ASEAN (Association of Southeast Asian Nations), an economic and political organization in Southeast Asia.
Step 2: Detailed Explanation:
ASEAN was established on August 8, 1967, in Bangkok, Thailand. The foreign ministers of the five founding member countries—Indonesia, Malaysia, the Philippines, Singapore, and Thailand—signed a document that formally created the association. This founding document is known as the ASEAN Declaration, or more commonly, the Bangkok Declaration, named after the city where it was signed. The declaration outlined the aims and purposes of the association, focusing on cooperation in economic, social, cultural, and other fields, as well as promoting regional peace and stability.
Step 3: Final Answer:
ASEAN was established after the signing of the ASEAN Declaration, also known as the Bangkok Declaration.