While a healthy measure of foolhardiness drove our ancestors toward discovery, fear kept them alive. If bravery is the wind that makes us soar like kites, fear is the string that keeps us from going too far. We need it, but the thing is, our heritage taught us to fear some of the wrong things. For example, to our ancient ancestors, strange and new people often meant new diseases and the occasional spear tossed at our softer bits. Today, the only things new people are likely to toss our way are some interesting curse words we can use to impress our friends. Fear of something like the aethers?
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