Among the most controversial subjects of DuBay's book The Human Church involved the formation of unions for priests. According to DuBay, unionization would allow members of the clergy to achieve four principal goals: (1) to secure better wages; (2) to secure better working conditions; (3) to end arbitrary transfers; and (4) to institute a tenure policy which would guarantee the right to a hearing prior to suspension. Included in the files are letters and postcards addressed to DuBay from other Catholic priests in 1966, most of which are commendatory and express support for unionization.