Marbury v. Madison was a supreme court case known for establishing the principle of Judicial review in US. Judicial review means that US courts can strike down statutes, laws and other government actions that violate the US constituion. This case is considered to be the one that laid the foundation of US constitutional law. The court's opinion was written by Chief Justice John Marshall.
As per the provision of separation of power the constitution framers wanted the government to have enough powers so that they could run the country but wouldn't be able to abuse it. Thus they developed the provision of separation of power, according to which the power is distributed among the three branches of the the government. So that if one branch of the government tries to abuse their powers others could balance it.
Marbury vs. Madison strengthened this provision as by judicial review the court can control the Congress by declaring laws unconstitutional and illegal.
Negative things would be that the people living in the mountains did not have fertile soil so a food source would be difficult to find but the mild climate would give some opportunitys for farming the seas allowed the greeks to have access to fish and things like that to trade
