Who believed that all socialist systems would eventually evolve in communist systems

Karl Marx. Marx was a 19th century thinker who is systematized a historical analysis of labor relations. In his theory, societies would eventually move forward from a capitalist mode of production, through class struggle, towards, first, a socialist state and later, and ideally, into a communist society where there would be no social classes, no money and no state, and the means of production would be of common ownership.  

i think that the answer is polishing peanuts

the catholic church withhold people's access to the bible during the middle ages.

people could go to church and listen to the teachings, but it was absolutely forbidden to own and/or read the books of both the old and new testaments. it was also prohibited to translate the books (which where originally in biblical hebrew) to any other language.

this was done so the church could remain in control of what their teachings were and to enhance their importance and power, while also being able to judge people's actions through information that was unavailable for the general public.