A global risk consultant has warned that humanity should tighten its seatbelts for a very bumpy ride in 2025. In his closely-watched annual forecast, Ian Bremmer on Monday predicted a 'uniquely dangerous' time for the planet, akin to the tense 1930s and the start of the Cold War. This he attributes to Russia's imperial ambitions, the unchecked rise of artificial intelligence (AI), Donald Trump's return to the White House and his revived trade war with China.