In 1980<span>, the American Psychiatric Association added PTSD to the third edition of its Diagnostic and Statistical Manual of Mental Disorders nosologic classification scheme. </span>
Matching hypothesis is the idea that you are more likely to make friends or be attracted to someone who is on a similar level of attractiveness as you. So, a extremely attractive person is going to be attracted to others that are extremely attractive. A average looking person will be more attracted emotionally and/or romantically with another average looking person.
<span>One of the main tools used by Ivan III was his trickery in the diplomatic process by forging treaties he had no intention on keeping. He arranged a very important marriage to Sophia that forged his claim to the throne. He also used diplomacy to weaken the mongols in the west and in the east.</span>
