[wongarsu]

I think the core is how we stand towards missile defense. During the Cold War the prevailing opinion was that mutually assured destruction was the best strategy. Missile defense undermines that strategy and was thus treated as a worse offense than building first-strike weapons.

Now the threat landscape has shifted. There is a closing window of opportunity where the US is the sole superpower and could get away with deploying such a system without much pushback. Whether it's a good idea is debatable.