The phrase Vasudhaiv Kutumbakam, the entire earth is one family, comes from the Mahaupanishad, part of which Veda?

1. Sustainable living is part of Indian tradition. 2. The Mahaupanishad is probably part of the Atharva Veda. 3. The phrase means the whole earth is one family. _Source: syllabus Science, Chapter 16, Sustainable Management of Natural Resources._