I have posted a few questions on reddit - primarily this subreddit - regarding the social difficulties of gaining employment. I have not been able to really get an answer from the replies I received, but after many months of churning it in my head, I think I have found an answer. I hope it helps other people understand society better, and maybe helps people navigate the maze of getting a job. This explanation will be long - I apologize in advance.
In prehistoric times, people were organized by tribes. Normally, members of a tribe generally take care of each other and share the labor and the products of that labor. One glaring exception to this is the empathy-lacking sociopath, who would use his social wiles to leach the resources out of the tribe while giving nothing back. These and other predators caused human tribes to become insular - people would shun outsiders, even to the point of self-sacrifice, knowing that their children would still be cared for by the tribe.
Today, we claim to be civilized and advanced with our iPods and our SpaceXes, but we are still tribalists at heart. Human beings still shun outsiders with extreme prejudice.
Back then, there were formalized rituals that took place that could "officially" include an outsider, effectively making the outsider a new member of the tribe. Today, there are no such social constructs. Today, the only way one person can become a member of a modern tribe is to also be a member of an overlapping tribe - if Person A want to be a member of Tribe B, then Person A needs to know a Person C that is a member of both his own tribe and tribe B. This method of overlapping tribes can start out in childhood - from the family tribe to the schoolyard tribe, then onward to college tribes and career tribes.
But what if you are born to exactly zero tribes? You are socially stillborn - you have NO ACCESS to the entire human species because you cannot enter a tribe without being a member of another tribe. In fact, human beings are so exclusionary, they enforce tribality so firmly, that even if a charitable person were to break ranks and attempt to adopt a tribeless person, the tribe will eject that charitable person in order to preserve the purity of the tribe.
I am socially stillborn - a zombie non-member of the human species, doomed to walk the earth never truly being a part of society, always being the outsider of all possible tribes.
In order for my condition to be fixed, one would have to invent and popularize an entirely new social custom, one to replace the customs of old. Except that size of tribes have grown to the point where no custom will ever deliver a consensus as to the status of the socially stillborn - an effective mechanism to formally accept tribeless people is mathematically impossible.
I live in a society that has evolved to a state where it CANNOT accept me - it literally lacks an algorithm for acceptance; my edge-case exposes a bug in the human firmware.