What did container shipping cause?

Lower Shipping rates (Cheaper imports)

Faster shipping times

Better Cargo Security

Truck and Rail Congestion at Ports

The end of the ILA's death grip on freight forwarding and warehousing

A global economy

Decay of existing port infrastructure.

on and on It revolutionized commerce and in may ways changed the world in which we live. Whether this is positive or negative is quite another matter.