(*Actually, a good amount of the oil Russia exported was not sold at market price but instead was used to bribe countries like Belarus and Ukraine to stay in the Russian sphere of influence, so the value per Russian is even smaller than $3.31; on top of that, the $3.31 is merely the gross revenue generated by the oil sales, one must deduct the cost of drilling and marketing it before any profit could be returned to the Russians; finally, of the puny per capita profits actually available for public benefit, most are actually siphoned off by oiligarchs [sic] and the Kremlin, while virtually none of it was used to improve the lives of ordinary Russians).
Lesson: Oil is actually a terrible curse for Russia. It provides just enough easy money for the Kremlin to keep itself in power, denying any incentive to develop a real, diverse economic base (something the Kremlin doesn't want to do anyway, because it would empower the population and reduce the Kremlin's influence), not nearly enough money to improve the quality of life. When the oil runs out, so will the sands in Russia's hour glass. Ironically, Russia's hostile, anti-Western attitude will actually undermine its economic base since, seeing Russian unreliablity, it will drive the Western countries to develop oil substitutes quicker than they need to, hastening the day when Russia will become wholly irrelevant. In other words, once again, Russia is cutting off its nose to spite its face.