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    The Curiously Inscrutable Principles of Trade Mechanics of Europa Universalis 4 (aka another EU4 trade guide)

    Prologue   My goal here is to explain from first principles the fundamentals of trade mechanics in EU4.  This will not attempt to be a comprehensive guide on all aspects of trade, but it does attempt to be a comprehensive guide and tutorial on the mechanics of trade nodes and merchants.  I will try to explain the system from the ground up as well as communicate an intuitive understanding and interpretation.  I will attempt to be rigorous with the mechanics but will be more brush-strokey with tactics, strategy, and modifiers (since modifiers just complicate things and in application are a part of strategy).  My hope is to explain the basics…