Most of us are quite aware, that there are historic communities throughout this land that have, for various reasons, been abandoned and left to decay, and thereby have become known forever after as ghost towns. While the reasons for this occurring does vary from place-to-place, common examples that we find, would consist of one-trick pony towns, in which the primary employer abandons the town, because perhaps the natural resources have all been profitably extracted from that community, or their business enterprise has turned bleak, or the railroad or highway that use to travel through the town, has been replaced by something more modern and that circumvents that city, and so on and so forth. The bottom line is that things do change, and communities that are overly dependent upon just one fundamental thing, such as a natural resource, or one big employer, are susceptible to that community being abandoned at some future point.
So too, within big cities, certain areas of that city may become forsaken, for reasons such as the perception that a certain neighborhood is not safe, or is not desirable, or is in the wrong school district, or it has lost important businesses, or has the wrong this or the wrong that, so that those that have money and the wherewithal and who have perceived that a specific area of town no longer appears to be desirable are often going to be the very first people to leave, because they have the not only the perspicuity to recognize that they should, but also typically have the funds that permits that choice to be made. So that, when good people with good incomes and good values leave a given community and these people are either not ever replaced, or are replaced by a substitute that does not have the same good values or capabilities, then that community loses something of real value and has it replaced, at best, with something that is inferior to that. So then, should this continue, that community will suffer the ill effects of being hollowed out, in which those that can leave, do so; whereas, those that have not the means to leave, are thereby left behind.
Those then that are left behind in communities that were once vibrant and healthy, are typically going to be the very people, that can ill afford to be left behind, which are the poor, the disadvantaged, the unhealthy, and the unemployed; yet, they are the very ones that because they lack the capacity to move, are unable to move, and thereby are left to suffer the ill effects of living in a community of despair, which offers them little hope, little opportunity, and little infrastructure of real value and merit.
After all, live long enough and we see that things do change, of which, some of those changes are for the better and some are not. Therefore, in absence of governmental or private enterprise programs which proactively deal with systemic problems within specific areas of a community, so as to provide assistance and opportunity for those people, that are in essence, left behind in a town or an area of a city that for all practical purposes is in a visible spiral of decline, than those people will essentially have limited good options to make something of their lives, for they have been forgotten and left behind.