Nine years ago, Yo-Yo Ma founded the Silk Road Project, a non-profit aimed at  studying the ebb and flow of ideas among different cultures along the Silk Road. Tonight, Yo-Yo Ma & the Silk Road Ensemble performed at the Benaroya Hall in Seattle.  The music was stunning, with three pieces (“Once We Were…”, “When the Wind Circles…” and “The Silent City”) standing out for me.  The latter was composed by Kayhan Kalhor and commemorates.. the Kurdish village of Hallabja in Iraqi Kurdistan… who are often called a ‘nationless nation’ and who have been the subject of numerous assaults and difficulties because of their …