I feel that South Africa shouldn't be on BRICS. But that is a diffrent topic.
I feel that there is no possible WWIII beacuse of globalization, we are all dependent on each other. Russia provides gas to EU, without this gas the european economy would stand still. No factories can run without proper fuel, Russia would lose a lot of money. After that the trade between EU and US would stand still therefor US losing a lot on that, with the American and Euopean contries on decline China would lose their biggest customer US.
It would become one big domino effect. Just look how the collapse of Greece did a big impact on the worlds economy, imagine if the the rest of EU had the same collapse.