The Roman societas ended up repressing foreign peoples and fostering military conflict.
罗马社会最终镇压外国人民并助长军事冲突。
英语百科
Obligatio consensu
Consensu or obligatio consensu or obligatio consensu contracta or obligations ex consensu or contractus ex consensu or contracts consensu or consensual contracts or obligations by consent are, in Roman law, those contracts which do not require formalities.