The increasing connectedness of the global economic system has long been touted as the path to greater prosperity and peaceful relations among nations and their peoples. There's just one hitch: Complex systems have more points of failure and also hidden risks that only surface when something goes wrong.
For example, our dependence on cheap shipping to move commodities and finished goods has resulted in a system vulnerable to environmental disruption, particularly climate change, and to rising political and military tensions.
The extreme drought in Germany last summer, the warmest ever recorded in the country, has resulted in such low water in the Rhine River that shipping has been greatly curtailed. Ships can only be loaded lightly so as to avoid running aground. Consequently, many more barges and other vessels have been pressed into service to carry the lighter but more numerous loads along the river. This has driven up the cost of shipping considerably. In addition, fuel tankers have not been able to reach some river ports resulting in scattered fuel shortages. Some industrial installations along the river have had to reduce operations.
The natural inhabitants of the river have also suffered as die-offs of fish and other marine life have spread along the river.