Question

why was the power of zar end in 1917

Answer 1

The Russian Revolution of 1917 involved the collapse of an empire under Tsar Nicholas II and the rise of Marxian socialism under Lenin and his Bolsheviks. It sparked the beginnin a new era in Russia that had effects on countries around the world. hence the power of Zar is collapsed on 1917.

and also the Putin is reasonable for it.