An offensive arms race in cyberspace has no winners

Is the world sliding dangerously toward cyber Armageddon? Let us hope not; but let us also apprehend the threat, and focus on what to do about it.
One country after another has begun exploring options for bolstering their offensive capabilities in cyberspace, and many other countries have already done so. This is a dangerous escalation. In fact, few other trends pose a bigger threat to global stability.