Why did Castlereagh support the Congress System in the years 1815 - 1820?

Castlereagh supported the Congress System between 1815 and 1820 for many reasons. The Congress System was made to balance the powers in Europe after the Napoleonic wars (1803-1815), and was started with the Congress of Vienna in 1815 and was ended in the Congress of Verona in 1822.

Castlereagh believed in international co-operation, as seen as his presence in the Congress of Vienna and the Congress of Aix-la-Chappelle, acting as a mediator. In the Congress of Vienna, Castlereagh wanted to make sure France was not punished too harshly, as he knew the French may want revenge if they had a terrible punishment. He also took on an extremely difficult job as conciliator in the Congress of Vienna

Candidates may be aware that Castlereagh believed in international co-operation and that he
had been a force for mediation at the Congress of Vienna and that this had been continued at
the Congress of Aix-La-Chappelle when he had sponsored the re-integration of France into the
concert of nations and the subsequent formation of the Quintuple Alliance.

Candidates are
likely to cite the friendship between Castlereagh and Prince Metternich of Austria as a further
example of his preference for cooperation.

Candidates may explain Castlereagh’s commitment to
the Congress System in terms of his desire to maintain European peace. This is evidenced not
only by Metternich’s comment that Castlereagh had been extremely moderate in his demands
at Vienna but also by his desire to reach a compromise with the United States. The Congress
System also reflected Castlereagh’s view that the balance of power could best be maintained by
regular dialogue between the Great Powers.

Candidates may address 1820 by reference to
Castlereagh’s State Paper of that year.

Candidates may also link Castlereagh’s pacific
intent to his desire to avoid war with the consequent risks to social order stemming from high
taxation.
Aka BRITAIN BROKE NO WARS SAD FACE 

http://store.aqa.org.uk/qual/gce/pdf/AQA-HIS1G-W-SMS-07.PDF
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