The details depend on the jurisdiction, but I think we're talking about straight cis white able bodied US born men under 40?
That minority is maybe 20% of the workforce at most?
To not be in any protected class in US labor law, you need to:
(1) Not be a veteran.
(2) Not have a physical or mental disability.
(3) Not be over 40.
(4) Have neither a religion nor the absence of one.
(5) Not have a race (including White.)
(6) Not have a skin color (including any of those typically described as “white” when discussing skin color.)
(7) Not have a gender (either gender assigned at birth, perceived gender, or gender identity; including “male” for any one or more of those.)
(8) Not have a national origin.
(9) Be neither a citizen nor non-citizen.
(10) Not have genetic information.
There is no one to whom this applies, obviously.
The details depend on the jurisdiction, but I think we're talking about straight cis white able bodied US born men under 40?
That minority is maybe 20% of the workforce at most?