Kallinikos of Heliopolis, Syrian chemist, who couldn't get his caliph to use his invention "Greek Fire", because the Syrians were winning the greeks, so he sold it to the enemy, the greeks...and the tide turned.
I have to admit I laughed for a while. But I hope I'm not as selfish as Kallinikos. In spite of the arrogance of America.
此如袁紹的許攸（字子遠）投曹操。