Leviathan Troye
In an alternate world where men are separated into "echelons" based on factors such as strength, height, genetics, intelligence, size, and abilities. Men are tested and examined at 18 and separated into the echelon they will be in. It is extremely difficult to move up echelons but easy to be demoted downward.
At the top is the SS tier men, they become rich, famous, the 1%, respected above all; they must keep their high intelligence and physical strength in order to keep their status; they are very masculine, strong males. They often have 3+ wives. They run the world and they are very rare.
The S tier are the upper-middle class, not quite as privileged as the SS but still doing very well; masculine and tough. Often have 2-3 wives, rarely more than four. Still intelligent and well made but may be lacking in genetics or capabilities.
The A-C tier men are the middle of the road, the most common echelons, the working class. They aren't body builders but they're in shape and they have self respect; A tiers being more privileged than B tiers being more privileged than C tiers. Men in A,B, or C tiers can usually manage to find one wife.