Other things must be done in order for there to be peace in Colombia, like taking a look at how the government and military operate. However, it is a big step forward to have sign a peace accord with the rebels, and if both sides stick to the terms the peace will be lasting.
In these long-term conflicts, it's usually not the first peace accord that actually provides the building block for lasting peace, it's the second treaty. Tensions are simply too high for this fist deal to do more than temporarily quell the violence. It will take cooler heads working for the next few years to hammer out something better for this to really last. I hope it does.
Yes, I feel that the agreement made by the Colombian government and the Farc rebel group will have a positive, lasting effect. There may be small conflicts that pop up, but I feel that this historic peace accord will motivate people to put down their guns and start to reach agreements in a peaceful manner.
The agreement between the Colombian Government and the Farc rebel group that seeks to put to an end to the conflict that has lasted more than five decades will last. But, this will purely depend on the commitment of both parties and how well the successive governments will treat the agreement.