Rule of law is a practice in governing a country which entrails that supremacy is to the law and nothing else. It is to be seen as a base for the exercise of government powers. Rule of law also means practice in governance of a country whereby powers and authority are exercised within the constitutional provisions. Under the rule of law nobody is above the law no matter his position. By this, is meant that justice prevails and everybody is given fair hearing by the court of law.

 FEATURES OF THE RULE OF LAW

The following are the assumed features of the rule of law: 
1. The rule of law means law of the land is supreme, that it is above other laws. This by implication means the use of power ought to be in consonance with law of the land and nothing else. 
2. The rule of law means equality before the law. This means the courts of law treat individuals equally irrespective of where they come from. 
3. The rule of law means whatever decision made by the court of law ought to be respected so that orderliness prevails. 

LIMITATIONS TO RULE OF LAW. 

Rule of law brings about smooth governance of society. Nonetheless, it is common to see certain limitations when it comes to the application looking at it in Nigeria context in view of the following: 

Military intervention 

From experience every military regime in Nigeria formed tribunals. Some of these tribunals where not useful to learned judges. The tribunals erode the powers of the courts because they handle cases theat were supposed to be tried by ordinary court. 

Deligated legislation

 Quasi judicial powers are some times given to certain governmental organizations to deal with a case of an officer found guilty by a commission of enquiry. The right to fair hearing may not be given to the affected officer.

 Diplomatic immunity 

A diplomat may not be punished for an office. He may only be asked to leave the country. And it is difficult sometimes for a country to see its citizen extradited from another country when he commits an offence and runs to that country for political asylum. 

Privileges accorded to certain personalities

 Certain personalities are given undue privileges. Take for instance, judges are not sued for any decision they take in their courts. Governors and presidents are not tried for an offence while in power. They are tried after they leave office. This makes them to misbehave or abuse their power sometimes. 

THE UNITED NATIONS CHARTER 

United nations, UN, is an organization formed in june, 1945 after the second world war. Like any other organization, UN was established to achieve certain aims, which are contained in its charter. Charter simply means written statement of permission. Therefore, UN charter simply means written statement of actions agreed upon by nations that constitute the UN. 

The major aims of the UN are given below: 

1. To save the succeeding generations from further destructions of war; 
2. To re-affirm confidence in the fundamental human rights, in the dignity and worth of the human person, in the equal rights of all men and women and nations both large and small. 
3. To maintain justice and respect for the obligations arising from treaties and other sources of international laws. 
4. To promote social progress, freedom and better standard of living. 
The UN charter comprises among other things the following aspects of life that seem to subjugate many nations through areas such as health, education, food, environmental hazards and governance (UN, 1973) 
A critical look at the United Nations as an organization Ever since the establishment of the UN in 1945, wars erupted in many nations, inspite of the attempt made to stop them. For instance, there was war between the united states of America and Vietnam in 1968. In the 1980s there was war between Britain and Argentina over the Falkland island. There was war between America and its allied forces and Iraq forces in 1990. The UN charter could not abate those wars, which invariably, means it is ineffective and may not save the world from destruction. 
Member nations of the UN are not equal in terms of economy, politics and military might such that the developed nations dictate to the less developed nations in those areas. The US for instance, interfered in no small measure in the critics to the name her as the police of the world. This negates the second aim of the UN charter. 
Much is to be desired pertaining to the third aim which talks on the maintenance of justice and respect for the obligations arisng from treaties and other sources of international laws. Ever since the UN emerged the so-called super powers have violated the  territorial integrity of the smaller nations. Take for instance, the attack of the US on Libya in April, 1986. The attack of US on Iraq in December, 1998 and Afghanistan in October, 2001 on allegations Americans could not prove. 
The big nations in the western bloc control the underdeveloped nations socially, politically and economically through their agents such as the World Bank and International Monetary Fund (IMF). This undermines the progress of the underdeveloped countries and subjects them to hunger and diseases. This negates the fourth aim of the UN charter.  The above discussion portrayed weakness of the UN as an organization. 
None the less, it has succeeded to some extent in bringing the whole world under one organization and it seems to make remarkable contributions in terms of assisting smaller nations in the event of draught and other natural calamities. 
CONCLUSION
 Rule of law is a practice in governing a country which entails that supremacy is to the law and nothing else. But it is common to see certain limitations in its application. United Nations as a unifying organ of all countries has failed to achieve remarkable success in its efforts to unite all the countries of the world. This failure can be attributed to some of this problems listed above.