Three years ago, long before anyone had ever heard of COVID-19, a different kind of virus spread around the world: a piece of malicious software code launched by a nation state. It paralyzed computer networks in hundreds of countries, disrupted global shipping, forced pharmaceutical factories to shut down, and inflicted an estimated $10 billion of economic damage.
On the physical battlefield, a widely accepted set of rules, backed by international law, governs conduct, with the aim of protecting soldiers and civilians. Establishing common rules or guardrails is much harder in cyberspace, where borders can't be easily defined and the tools and tactics of combat are always changing. But it has never been more urgent.