By Nelson Bocanegra, Oliver Griffin and Carlos VargasBOGOTA/BUCARAMANGA (Reuters) - Leftist Gustavo Petro, a former member of the M-19 guerrilla movement, who has vowed profound social and economic change, won Colombia's presidency on Sunday, the first progressive to do so in the country's history. "From today Colombia changes; Colombia is different," Petro told cheering supporters in Bogota's concert arena. I know he will be a good president and he will help those of us who are least privileged. Graphic: Leftist Petro wins Colombia presidency - https://graphics.reuters.com/COLOMBIA-ELECTION/dwpkrmabovm/chart.pngStory continuesPetro's victory showed people in Colombia - where nearly half the population lives in some form of poverty - are eager to fight inequality, said Daniela Cuellar of FTI Consulting. Current President Ivan Duque tweeted he had called to congratulate Petro, and they have scheduled a meeting in coming days to ensure a harmonious transition.
