They always have, and likely, always will.
Paging Captain Obvious!
"What is the source of quarrels and conflicts among you? Is not the source YOUR PLEASURES (the Greek word for "pleasures" is "hēdonais;" the Greek word our English word "Hedonism" comes from) that wage war in your members?
YOU LUST and DO NOT HAVE; SO YOU COMMIT MURDER. You are ENVIOUS and CANNOT OBTAIN; SO YOU FIGHT and QUARREL.
You ASK and DO NOT RECEIVE, BECAUSE YOU ASK WITH W R O N G M O T I V E S, SO THAT YOU MAY SPEND IT ON YOUR PLEASURES." (James 4:1-3, Emphasis added)
God's Word tells us exactly where fights (lit., state of war, polemoi) and quarrels (lit., individual disputes or battles, machai) come from; they come from WITHIN OURSELVES, not man-made Global Warming! The apostle James answers the question: the state of WAR and BATTLES come: "from YOUR DESIRES that BATTLE WITHIN YOU." Conflicts, war and battles spring up out of (ek) out of our inner sensual lusts or "pleasures" (hēdonōn; cf. v. 3)!
James 4:2 says that war is the direct result of man's illicit lusts: our greed, our envy!
OUR LUST for POSSESSIONS, POSITION, and POWER brings about MURDER. Man's COVETOUSNESS and GREED results in the FRUSTRATION of NOT OBTAINING OUR hotly pursued DESIRES. This all leads to the quarrels and fights, and wars that battle against people, mentioned in James 4 verse 1.
In James 4 verse 3 the Apostle does not say that the reason mans lusts are not fulfilled is because people failed to ask God to gratify those desires. He does NOT say "You DO NOT HAVE BECAUSE YOU DO NOT ASK GOD" (Emphasis added). In verse 3 James says that one reason a believer does not receive what he asks for is because they are asking with WRONG MOTIVES: they are asking in order to "spend" (this word could be translated SQUANDER) what they receive from God on their "PLEASURES" (pleasures is the same Greek word hēdonais found in verse 1)!
Where do wars, battles and quarrels in Africa and the rest of the world come from? They come from within men:
1) Men are envious and greedy, they lust for possessions, position and power.
2) They may or may not ask God to fulfill their illicit desires. If they do ask, God refuses to answer their lust-centered prayers because God will never provide for hedonistic squandering".
3) As a result of THEIR covetousness and greed; WANTING and NOT getting what THEY WANT, men then fight and go to war and battle in order to have THEIR LUSTS and THEIR DESIRES FOR POSSESSIONS, POSITION AND POWER fulfilled.
God says, fictional man-made "Global Warming" has absolutely NOTHING to do with the conflicts in Africa or anywhere else.