The Council on Foreign Relations (CFR) posts an article at the end of every year with their opinions about what the 10 most significant world events were.

Examples of what they named the year's most significant event in the last 3 years:
2023 - Global Temperatures Shatter Records

2022 - Russia Invades Ukraine
2021 - Countries Fail the Climate Change Challenge—Again
2020 - The COVID-19 Pandemic

Link for the 2023 article: https://www.cfr.org/blog/ten-most-significant-world-events-2023

This should be an exciting market to track people's best guesses about the most important events of 2024 in real-time.

Please look at the suggested answers so far and only propose answers that haven't been suggested yet. Mods will not resolve to answers on topic that have already been suggested will not be resolved to.

They will not multi resolve.

If there is a lot of ambiguity after the CFR article comes out, resolvers will hear arguments about what to resolve in the comments. If nobody suggests an answer close enough to CFR's number one most significant event, they will resolve N/A, but I think that is unlikely.