By Michael Beltran KALINGA, Philippines — On the mountainsides flanking the mighty Chico River in the northern Philippines’ Kalinga province, residents of once tight-knit villages have drifted apart in recent years. Hearty greetings between neighbors tending to farmlands have been replaced with avoidant looks or glowering stares. “We don’t talk much like before,” says Gohn Dangoy, a 59-year-old farmer of the Naneng tribe in Kalinga’s Tabuk city. “If we do, we argue. Families and friends alike are at odds.” He says the “deep division” started because of the proposed dam on the Chico River. West…