There are more free renewable ways to produce energy than people realize and that since many decades. But People have been conditioned to think in terms of scarcity & competition when there's none, as it would be difficult to control a free society where every citizen is free because s/he produces his own energy and is not depending on any entity to do so. So, there will be no peace as long some powerful individuals make the rules and that the masses blindly buys into it.
As long people will ask someone else to take care of peace & energy issues on their behalf ... there will be war as people willingly give away their own power and expect someone else, who will use that power the wrong way, to fix what they have to fix on their own in a 1st place ... People don't like to hear that but ... things haven't worked that well the way it has gone till now! So, if people are not free themselves, how can they expect peace in the world when the conditions for this to happen are far from being met on people's individual basis?!