Answer: Even though there are many positive effects of the Neolithic Revolution, there are some negative effects. Since there were no refrigerators back then (at least in the summer) when the early humans would store food for long period of time, the food would most likely mold and become non-edible. While domesticating animals the early humans contracted sometimes deathly diseases and illnesses. Also if the weather was bad for crops one year or more, the people would starve until the next season for the crops or until they could go hunting.