If freedom means voices, venues, votes, and vetoes, what is the biggest threat to democracy today—and which do we defend last?

What is the biggest threat to democracy today?

It is not tanks rolling across borders or generals seizing parliament at dawn. The gravest danger is slower, quieter, more corrosive: hybrid warfare. In this new battlefield, adversaries dismantle democracy by silencing voices, destabilizing venues, undermining votes, and eroding vetoes.

The strategy is elegant in its patience—freedom is hollowed o...