Not only grote , but also niebuhr , mommsen and all the other historians of classical antiquity , have come to grief over the gens .
不仅格罗特，而且尼布尔、蒙森以及迄今为止的其它一切古典历史学家，都没有解决氏族问题。
Mommsen also feels this , and hence makes the assumption : " for a lawful marriage outside the gens , it was probably necessary to have the consent , not only of the chief , but of all members of the gens . "
