If there is physical violence among members of society a government is failing at which of its purpose

The purpose of the government is to "establish Justice, insure domestic Tranquility, provide for the common defence, and promote the general welfare."

So, mostly everything to do with society's welfare.

The Government is the social organization created to basically set up and enforce public policies such as maintaining the order by establishing justice promoting the rule of law, protecting the nation by common defense, promoting general welfare supporting the economic system and protecting people's rights. If physical violence rises, the government is failing at maintaining the order and promoting the rule of law.

Explanation:

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