A tentative peace agreement would add at least 1.5 percent to Colombia's gross domestic "forever," according to President Juan Manuel Santos.
Santos, who spoke with CNBC while attending the U.N. General Assembly this week, referred to an agreement he reached last week with the Colombian FARC rebels on possibly ending a 50-year Marxist guerrilla war that has left more than 250,000 people dead.
No deal has been finalized, but the toughest issues were settled during a negotiating session in Havana, with a deadline of six months to finish what remains. In exchange for ending the violence and agreeing to disarm, the rebels will enter into a "transitional justice" process — a separate court system that will include international representatives. Those who confess to crimes will receive reduced sentences of five to eight years, they will not be extradited to the United States, and they will be permitted to enter politics.