Mannsland(Man's Land in English, and in the location of Iceland in our reality) was a very old country with very old traditions. Settled by tribal youths fleeing forced feminization in Scotland and Norway in the 800s CE, the founders rejected the noble privilege of the early middle ages and instead adopted the most basic of meritocratic systems: The strong rule, and men are the strongest.
Unlike the rest of the world, where democratic rule had resulted in women holding 98% of government jobs, Mannsland was ruled by men, chosen for their physical strength. On their 18th birthday, men would hike into the interior of the island to battle for supremacy. In the old days they would have to live off the land, but in the modern era waystations run by female volunteers distributed food and water. Men did not leave the interior until they had acquired a full harem of 10 women, so that their return would not disrupt his community's gender balance.
Today was Johan's 18th Birthday and it was time for him to prove himself. He had a plan. The same plan that allowed his father to become a man 19 years ago: He would lie in wait and ambush someone who had already claimed 9 wives, risking himself in just a single fight. Yes, it might be dangerous to attack a man who had won 9 brawls(weapons were forbidden), but with the element of surprise he should be able to pull it off.
Johan was very lucky, spotting a man with 9 wives almost immediately after entering the interior. "He must be ambushing people as they enter, catching them off guard", Johan thought to himself. "I guess I'll..."