What caused the higher percentage of minorities in cities in the 1950s?

White flight.

Explanation:

White flight refers to the large scale migration of white families from the cities to the suburbs, especially during the 1950s-1970s. Some of the main causes of white flight were:

- The end of segregation laws meant that African Americans and other minorities could legally settle in formerly white-only neighborhoods, especially close to urban centers.

- Increased living standards meant that the generally more affluent white families could afford bigger housing in the outskirts of the cities.

- Development of road systems and phasing out of large public transportation networks meant cars became the preferred means of transport, especially for white families who could afford them. People could live relatively far away from their workplaces and commute by car.

White flight meant a radical change in the demographic composition of cities in the US. As more and more white families left, and as people of color moved to urban centers, the racial makeup of cities changed dramatically. In Detroit, white Americans comprised 83.6% of the population, while African Americans accounted for 16.2% of the total. By 1970, whites accounted for 55.5% of the Detroit residents, while African Americans were now 43.7% of the city's population.

separation of powers, therefore, refers to the division of government responsibilities into distinct branches to limit any one branch from exercising the core functions of another.   the intent is to prevent the concentration of power and provide for checks and balances.  

the traditional characterizations of the powers of the branches of american government are:

* the legislative branch is responsible for enacting the laws of the state and appropriating the money necessary to operate the government.

* the executive branch is responsible for implementing and administering the public policy enacted and funded by the legislative branch.

* the judicial branch is responsible for interpreting the constitution and laws and applying their interpretations to controversies brought before it.

forty state constitutions specify that government be divided into three branches:   legislative, executive and judicial.   california illustrates this approach; "the powers of state government are legislative, executive, and judicial.   persons charged with the exercise of one power may not exercise either of the others except as permitted by this constitution."

while separation of powers is key to the workings of american government, no democratic system exists with an absolute separation of powers or an absolute lack of separation of powers. governmental powers and responsibilities intentionally overlap; they are too complex and interrelated to be neatly compartmentalized. as a result, there is an inherent measure of competition and conflict

minnesota:   minnesota house research,   separation of powers: when statutes and court rules conflict, 2005