This part also explores how economic freedom had been introduced in Russia through a series of problematic experiments. A set of policies known as "shock therapy" (also described in the 2007 book "The Shock Doctrine" by Naomi Klein) were brought in mainly by outsiders, with the effect of destroying the social safety net. Sudden removal of subsidies caused hyperinflation, and economic crisis escalated during the 1990s until some people were being paid in goods rather than money. The Russian parliament attempted to revolt, to which then-president Boris Yeltsin responded with military force, subsequently removing parliament's power in favour of autocracy.