Timeline of the Cold War for kids (1947 - 1953)
The role of Cold War in the history of the United States of America.
While it is impossible to rule out the sudden appearance of new ideologies or previously unrecognized contradictions in liberal societies, then, the present world seems to confirm that the fundamental principles of sociopolitical organization have not advanced terribly far since 1806. Many of the wars and revolutions fought since that time have been undertaken in the name of ideologies which claimed to be more advanced than liberalism, but whose pretensions were ultimately unmasked by history. In the meantime, they have helped to spread the universal homogenous state to the point where it could have a significant effect on the overall character of international relations.
Cold War International History Project | Wilson Center
The other major "contradiction" potentially unresolvable by liberalism is the one posed by nationalism and other forms of racial and ethnic consciousness. It is certainly true that a very large degree of conflict since the Battle of Jena has had its roots in nationalism. Two cataclysmic world wars in this century have been spawned by the nationalism of the developed world in various guises, and if those passions have been muted to a certain extent in postwar Europe, they are still extremely powerful in the Third World. Nationalism has been a threat to liberalism historically in Germany, and continues to be one in isolated parts of "post-historical" Europe like Northern Ireland.