Actually price stability and a lack of predictability are what is killing oil business. Sometimes it is cheap, sometimes it is not cheap. We've seen prices range from the lower thirties to over a hundred dollars per barrel in the last decade. Countries like Russia, Venezuela, and Saudi Arabia are suffering economically when prices go down. They 'fix' it by over supplying and subsequently under supplying. This then causes production bottlenecks and shortages that drive the price up again. Meanwhile their production is getting more expensive because they've exhausted all the cheap options which means they need the prices to be high most of the time or they are losing money. Likewise fracking based extraction in e.g. Texas is only economically viable if prices stay high.
Over supply due to countries dumping their reserves to balance their budgets are keeping prices low. This makes investments in more expensive ways to produce oil less attractive. Eventually cheap reserves will run out. So cheap oil is a double edged sword.
That's why wind projects like typically have investors behind them that used to dabble in oil. Just makes more sense to that than to invest in exploiting oil reserves that may never deliver enough ROI to be worth the trouble.
That's irrelevant. Unless you can show that the in place regimes would not have extracted the oil (something not even Norway can resist), the wars had no impact on its presence in the market (other than perhaps a delay during instability).
