The revival of the Cold War attitudes between the U.S. and Russia are just the beginning of the an expanding scene of digital vulnerabilities and shocks to the system that could shut down the grid, cut off grocery and supply lines or leave millions without power in the cold. With global tension, the pretext could come from anywhere:
From Mac Slavo:
The coming era could be the age of electronic disruption, as ATMs, power grids, bank accounts, Internet servers and other important entities in society are intercepted, taken down, hacked or shut off by criminals and commandos in the ongoing cyberwar. Dissidents will be flagged and cut off from their accounts. Natural disasters will compound with these factors, testing the infrastructure and the integrity of the people themselves, who are in danger of devolving into civil unrest.