Global silver trade from the 16th to 18th centuries American mining for the early part of the 16th Century. Mining in the Americas became formally industrialized when the process of mercury amalgamation became popularized. Mercury amalgamation was invented by a Spaniard in central Mexico in the 1550s. Historians dispute what individual was the first to invent the process, however most agree that it was a Spaniard. Mercury was the one of the highest costs of production for the Americas, since much of it had to be shipped. The ratio of Mercury to silver produced was about two to one. Furthermore, German miners introduced the stamp mill and lead smelting
Stateless nation the same awareness of being a stateless nation. In Spain, only Basques and Catalans have claimed their right of self-determination, which in the Basque country gave rise to the militant movement ETA, and in the case of Catalonia, has led to multiple attempts to secede from Spain during the past four centuries, as an independent Catalan Republic. As not all states are nation states, there are ethnic groups who live in multinational states without being considered "stateless nations". The symbiotic relationship between nations and states arose in early modern Western Europe (18th century) and it was exported to the rest