Nobody can be sure... But it will come One day, and let's not hope in our lifetimes. This war will probably be taken out on civilians more than military targets. With more and more countries developing nuclear weapons, there is a chance it will be very deadly. Enemies will hack our electronics and cut off our resources. For now enjoy life in the safety that we have and hope for the best
It would take a severely psychotic person to start world war 3. No nation with the exception of north Korea is willing to knowingly send hundreds of thousands to die for land, natural resources or just cause. China wouldn't even go to war, they may talk Big but they realistically know there is no way to move there military effectively.