Though “supply chain” became a household term only in the past generation, it has been around since humans have been engaging in commerce. One group had fish and the other had arrowheads. In order to fish, the fishermen needed nets, which another group provided, while the arrowheads went to a group that could hunt for animals, whose kill disseminated through the system by exchange with those providing arrowheads. This is obviously a poorly thought out scenario, but all I want to convey here is that supply chains are integral to human life, and always complex. Human beings need many things in order to live, and they are divided into many groups that care for themselves. This inevitably leads to trade and at times to war, which happens when one group tries to use the needs of another group to force them to submit. The supply chain has always been with us.