Let alone how raiden gave up fighting for his family as well. It went in the completely wrong direction from what 4 ended on. Rising just made it out that the war economy multiplied out of control. MGS4 ended on a high note, leading the audience to expect the war economy to end and the world to become much more free. I do not like the game, mainly the story. I get down voted nearly every time I say that, so I'll keep this brief. N'mani represented peace and prosperity in his un-named(?) country, but was ripped to shreds in the first 10 minutes or so of the game, foreshadowing the future that the US may soon fall into.

The continent of Africa has, as we know, been stricken by civil wars for years and years. That is why the game starts with the death of N'mani. If anything, the game questions 'are we actually better off without The Patriots?' Basically, the regulator body that kept all the insanities of war contained is gone, but those insanities (Sam, Desperado, Raiden) still exist, and are now let loose. Armstrong would never have been chosen by The Patriots to lead as he was too insane, but with the annihilation of The Patriots it looked like he had a shot. With The Patriot's gone, it became a much different political climate, hence entities like Senator Armstrong. What we are presented with in Rising is the 'free market' that took its place - corporate entities bought out armed forces, built their own Metal Gears (RAXA), and we had much more fringe PMCs like Desperado cropping up. Nanomachines, cybernetics, AIs, etc all still existed after The Patriots were shut down, essentially all that was destroyed thanks to FoxALIVE was the War Economy/Guns of The Patriots that they controlled. MGS4 revealed that The Patriot's reach only actually extended throughout the US and perhaps small pockets in other nations (They seemed to have an influence with the UN, but weren't in control).

MGS4 didn't result in the destruction of PMCs, it resulted in The Patriots going down.

In response to people saying that it contradicts MGS4 - how so? I personally don't see it.

Metal gear rising timeline