eli5. why isn’t the world set up to kill nukes in the air?

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Nukes in this day and age seem to me like they should effectively be obsolete. I feel like in the age of satellite observation and the idea of geo-privacy being basically null, every developed country ought to have anti icbm tech, similar to an mrap. Short of mass amounts of dirty bombs, I feel like nuclear war should be a non issue in modern times.

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Anonymous 0 Comments

Aside from the technical challenges, there is a reasoning that having working defences against nukes is bad.
The reasoning goes like this:
The threat of retaliation and mutually assured destruction is what keeps countries from using nukes.
Anti-nuke defences would take away that threat. An attacking country would no longer have to fear its own destruction.
Therefore it would make using nukes a viable option again, which is bad for everyone but the country with the defences.

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