Final answer:
The other major issue faced by the world at the start of the 21st century was the war in Ukraine.
Step-by-step explanation:
In addition to the global recession, another major issue faced by the world at the start of the 21st century was the war in Ukraine that started on February 24, 2022. This war caused significant disruption to the global supply chain system and put enormous strain on the banking system. It also had a profound impact on people worldwide, affecting both consumers and the labor force.