How do we know the Romans thought family relationships were important?

The Romans placed significant emphasis on family relationships, evident in their legal and social structures. The concept of familia encompassed not just the nuclear family but also extended relatives and slaves, highlighting its centrality in Roman life. Additionally, literature and historical texts, such as those by Cicero and Livy, often reflect the importance of family honor and loyalty. Furthermore, the practice of ancestor worship and the establishment of family tombs underscore the deep reverence Romans had for their familial ties.