bulwark (en)

(noun) defensive wall

coterie (en)

(noun) an intimate and often exclusive group of persons with a unifying common interest or purpose

plutocracy (en)

(noun) government by the wealthy / (noun) a controlling class of the wealthy

There is no alternative (en)

a slogan refering to globalization popularised by Margaret Thatcher; means that the market economy is the only system that works, and that debate about this is over