The security that allowed global transport of goods across the "free world" was a bribe offered by the United States to buy compliance from other nations for its security policies against the Soviet Union. We're backing away from those promises now that the cold war was won.
The urbanization of the world has had some long term consequences, as people move into urban areas, the have fewer children, leading to many populations not having sufficient numbers of children and younger people entering the population pyramid to support those older than themselves. China has a real problem they can't solve in this regard.
Deglobalization has begun, supply chains that rely on cheap reliable trans-national shipping are unsustainable, and need to be replaced. This compounds the effects highlighted in the original posting. It's not pessimistic enough!