World wars are described by Wikipedia as "a war involving many or most of the world's most powerful and populous countries. World wars span multiple countries on multiple continents, with battles fought in multiple theatres."
If those same parameters used to categorize past conflicts as "world wars" were used to describe conflicts today WW3 may have started years ago, especially if the internet were to be considered a "theater" in which attacks are conducted.
don if Putin started a conquest across Europe trying to put the Soviet Union back together by military force (Which he has stated he wants to do) that wouldn't turn into a World War?
you should stay away from the liberal websites, don... that not what Russia is doing at all...