I wonder what could’ve compelled him to remain in isolation, being the last remaining individual of his culture. Why not join another tribe? Why not attempt to

I wonder what could’ve compelled him to remain in isolation, being the last remaining individual of his culture. Why not join another tribe? Why not attempt to seek out civilization? Perhaps if the outreach organizations could’ve gotten to him after the first massacre, he wouldn’t have been habituated to the idea that all outsiders were out to kill him.