This article is the introduction of the volume The Many-Headed Hydra. The Hidden History of the Revolutionary Atlantic, to be published by Amsterdam, a historical investigation of the multi-ethnique class which formed the cheap workforce which made possible the rising of capitalism and of modern transatlantic economy, since the beginning of 17th century. A motley crowd made by merchants, pirates, workers, women, soldiers, convicted criminals, religious radicals, etc. developed forms of resistence and mutual cooperations, in order to escape the deep (...) exploitation of the workforce, taking place in an economy already globalised. The authors tell the story of the role played by these wretched of modern world and of their fight for liberty. (shrink)