Q did not exactly specify what "lost forever" means. We assume this means come around to our way of thinking, but this is not really necessary to 'save' the world. Perhaps many of us will come to understand that we are not exempt from being shown new things. We may be awake, but that doesn't exactly mean we are seeing all the light.
We may find that many of the things we currently argue over are moot in the face of Truth and what lay ahead, and as such we will find that it is all of us who have to come around to a new way of thinking.
Even if that isn't the case, and they 'should come around to our way of thinking' - if we arrived at our views because of rational and logical thought, then it is not unreasonable to see people find the path no matter where they currently are.
Consider, people struggling to make ends meet are vulnerable to class warfare messages. They are vulnerable to promises of the government to make things fair. People who are sick, who have been raped or abused, etc - all of them are kept vulnerable by the designs of people who believe it their place to lord over our affairs.
Once that vulnerability is relieved, healing and logic can begin to prevail over stimulus and emotion.