President Donald Trump is synonymous with a "revolution" taking place in U.S. politics and society, according to Nobel Prize-winning economist Robert Shiller, but not in a good way.



Speaking to CNBC ahead of the World Economic Forum (WEF) , Shiller, a renowned economist and academic who is also attending the Forum, said he was concerned about the changes in society and politics heralded by the president.



"Trump is a revolution unfortunately, (and one) who's reaffirming nationalism and he's showing that Americans are no better than anyone else," Shiller told CNBC ahead of the Forum. "It's troublesome to me. I'm concerned."



"So far we've gotten through a year of him and we're optimistic that so he might be defanged," the Yale University economics professor added.



WEF aims to bring global leaders, policymakers and private and public enterprises together to find shared solutions to the world's most pressing problems such as climate change, inequality and poverty – not areas that Trump's anti-globalization "America First" policy has touched upon much in his first year in power.

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Shiller said Trump's reception by the Davos audience was going to be interesting to see.



"He's coming to Davos this year and he's going to try out his rhetoric on the least sympathetic audience I can imagine. He likes sympathetic audiences so I don't know how he's going to manage this one."



While Davos does attract criticism, with some calling it a "talking shop" for the well-off that fails to bring about concrete change, Shiller was supportive of the event. He said the 2018 theme – "creative a shared future in a fractured world" – reflected the problems facing the world, namely what he saw as "the problems of the international growth of populism and nationalism, racism and religionism that is quite striking

right now."



"Those fractures are re-assertions of traditional fractures and so it's like we're back to history again. We were in a period of enlightenment following the horrors of World War II and now the people who remembered that are disappearing so we're going to go back and make the same mistakes," he said.