In a post on X, Tewari said, "The League of Nations was founded on 10th January 1920. It could not prevent World War-II. The United Nations (UN)  was founded on October 24 th 1945. The UN could not prevent 285 major armed conflicts from taking place from 1946-2023. The Earth Summit was held in Rio De Janeiro from 3rd to 14th June 1992. Three decades later it has not been able to stabilise global warming or substantively bring down GHG emissions."
"Before we go into paroxysms of ecstasy over some ‘agreed texts or consensus declarations’ we should be clear eyed about the limits of multilateralism. Ultimately as long as Westphalism hold the field nation states would act in their own interests," the former Union minister said.

"History of the UN is littered with unfulfilled and unimplemented Head’s of States declarations. What are the concrete deliverables and what are the timelines? Didn’t find much in the New Delhi leaders declaration," Tewari added.

His remarks came two days after the New Delhi Leaders' Summit Declaration was adopted on Saturday after consensus was reached among the member states during the G20 Summit.

On Sunday, Congress leader Shashi Tharoor hailed India for organising G20 Summit and in a post on X, he said, "Well done (Indias G20 Sherpa) Amitabh Kant. Looks like the IFS lost an ace diplomat when you opted for the IAS. Negotiated with Russia, China, only last night got final draft, says India's G20 Sherpa on 'Delhi Declaration' consensus. A proud moment for India at G20."

The two-day G20 Summit, which concluded here on Sunday, has been a success for the country with African Union becoming a permanent member of the group and the New Delhi Declaration was adopted with consensus.