The World Economic Forum outlined the top 5 threats that can happen at the same time, threats for which no country is prepared to handle. Here they are:
2) Malicious, or accidentally harmful, use of artificial intelligence.
3) Malicious use of, or unintended consequences from, advanced biotechnologies.
4) A natural or engineered global pandemic.
5) Intentional, miscalculated, or accidental use of nuclear weapons.
I would add another one:
6) Mass migration caused by:
- Move from rural to urban areas;
- Displacements due to climate change; and
- Displacements due to wars and conflicts.