ForanexplanationoftheextraordinarypersistencewhichthemassesofthepeopleoftheSovietUnionareshowingthroughouttheyearsoftheRevolution,manyforeignobserversrely,inaccordwithancienthabit,onthe"passivity"oftheRussiancharacter.

Please segment the words:
For an explanation of the extraordinary persistence which the masses of the people of the Soviet Union are showing throughout the years of the Revolution, many foreign observers rely, in accord with ancient habit, on the "passivity" of the Russian character.