An Ark - of tunnels around the world for re-seeding seeds and special people.
Was there - is.there still - an Armageddon plan? Elites in a chosen moment enter their sanctuaries and Okay the Nuclear Holocaust button.
Anything that survives on the surface after months or years of fallout is used for whatever purposes deemed necessary. (Slavery back with a Big Bang). Population 'stabilised' for probably hundreds of years.
Are there people in high places of power who might have had real discussions and plans for such downright evil a prospective future? Well, the present collective of elite leaders and influencers plus the crazy worldwide pandemic scam would suggest very much so - yes, such people who would talk of such things evidently prowl this planet as we speak.