Of course the Cold War is still happening: America has been exporting war wholesale for decades. Just because Russia hasn't been doing it at the same scale as well, doesn't mean squat.
The US and Russia have had plenty of opportunities to leave each other in peace over the last 30 years. The trouble is, they're not the only parties to this farce. Incredibly powerful, massively entrenched super-power-like military industrial multinational corporations are involved as well, and there is no way in HELL they are going to let their number one revenue source dry up just because we all want peace.
Its quite simple: stop assuming that its sovereign nation states doing all the fire-lighting. We are way, way beyond that point now. If you want to get a grip on war economy you have to stop allowing your politicians to push you - the people - into more and more heinous debt, for more and more heinous reasons (imperialist warfare against innocents), without repercussion.
This is going to be a tough sell. Pretty much everyone using computers to establish themselves in the technology markets today is going to have to deal with a multinational, war-mongering, mega-corporate military-industrial giant. We're well and truly being dominated by those who are quite happy having us all in the abyss, trembling in fear at what would happen if we stopped buying from General Electric, Samsung and co.