Mankind on the Run is also known as On the Run (1979).
Kil and Ellen Bruner were Class-A citizens, labelled as privileged and stable by the Key that every man, woman and child wore in the well-ordered world created after the Lucky War. Then Ellen vanished, and suddenly all Kil's privilege isn't enough to bring her back to him. The layers of intrigue he is able to unwrap show him only the beginning of a great plot against established society – a plot that somehow involves Ellen.
For the first time he feels doors closing around him, hears the official silence of the World Police, feels the great weight of authority's disapproval, and learns what it means to be a man alone. His desperate search for his wife will cost him everything he thought he believed in as he digs ever deeper into the ugly reality behind the façade of his world's peace and security, and finds himself at last.