Rothschilds, Warburgs, Rockefellers, Morgan etc. Pretty much the oldest and most powerful families of the early 20th century from both the United States and Europe. Think OPEC westernized for banking - bc that's all it really is. Read "The Creature of Jekyll Island" to get a better understanding of the history of that historic meeting held in secret on an island off the coast of Georgia (Jekyll Island).
It's amazing the amount of ignorance this country has on such an important issue. What's even more amazing is how it's been allowed to continue without the institution ever being questioned! Ron Paul's the only one in Congress who vocally calls into question its existence...but good luck winning the top spot Ron. Since that historic day in 1913 the dollar has lost about 99% (give or take) of it's purchasing power. The most genius scheme ever devised for sure. Truly amazing...