<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:arial,sans-serif">On Tue, Mar 15, 2016  PM, Kelly Anderson </span><span dir="ltr" style="font-family:arial,sans-serif"><<a href="mailto:kellycoinguy@gmail.com" target="_blank">kellycoinguy@gmail.com</a>></span><span style="font-family:arial,sans-serif"> wrote:</span><br></div><div class="gmail_extra"><div class="gmail_quote"><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><span style="font-size:12.8px"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">​> ​</div>Why did addiction evolve? </span></blockquote><div><br></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;display:inline">​</div><font size="4">It couldn't fail to evolve because positive feedback loops exist and are more common than negative feedback loops needed to control them. That's why most mutations are harmful and why evolution moves so slowly.  <br><br> John K Clark</font></div><div class="gmail_quote"><br></div><div class="gmail_quote"><br></div></div></div>