So ... Once again, "Russia as the cornerstone of the world economy" ? Are you seriously Huh? Why not Spain? Or like Italy?
Do you know why I laugh? Because in the WORLD economy, the share of Russia is 1.99%, and Italy is 2.44% !!! What is the impact of Russia on the world economy? 2%? The Italian economy is POWERFUL!
Comparing GDPs of different countries is pretty oversimplifying and kinda misleading.
Russia exports oil,natural gas and grain,which are essential for the global economy(especially for the European economy). Natural gas is being used in many industries and what would happen with the Italian economy,if Russia stops selling oil and gas to Italy?I assume that Italy might start buying oil and gas from somewhere else(at a higher price),which will eventually slowdown the growth of the Italian economy and lower the standard of living in Italy.
What if Russia stops exporting grain?This might create food shortage in Europe.
Anyway,this is an economic war between Russia and the western world,not between Russia and the entire world.Both Russia and the western world will suffer a lot from the sanctions.