i´m not for sure but it might be Capitalism
Informal Communication Methods :)
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The Missouri Compromise, although criticized by many on both sides of the slavery debate, succeeded in keeping the Union together for more than 30 years. In 1854, it was repealed by the Kansas-Nebraska Act, which dictated that slave or free status was to be decided by popular vote in the territories of Kansas and Nebraska; though both were north of the 36th parallel.
I believe that Tocqueville who wrote the book Democracy in America published in 1835 thought that a committment to the common good was essential to democracy because in a democracy it is not just about the rights of a particular individual but about the collective rights of all citizens by virtue of being human and having basic needs such as freedom (he criticized slavery) the need for education, health care and food and shelter.