Which is also mentioned in the article -_- in the "Violence and Conflict" section. Note that oil-rich states are both the targets and instigators of conflict. For instance, Venezuela's recent conflict with Guyana after their recent discovery of oil. [1, 2]

[1] https://apnews.com/article/venezuela-guyana-territorial-disp...

[2] https://apnews.com/article/guyana-oil-discovery-money-14c23a...