How did collectives in the soviet union avoid the competition that drives a free market economy?

One specific historical event or development during the period 1786-1861?

Law which gave electricity to people living in the farm victory gardens boll weevil drought great depression franklin d roosevelt warm springs, ga new deal aaa - agricultural adjustment act ccc - civilian conservation corp rea - rural electrification adminstration ssa - social security act

(05.04 mc) how did the roman transportation system keep the empire strong? plz