What do levirate and sororate marriage systems stress?

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Levirate and sororate marriage systems stress the importance of family alliances. In levirate marriage, a man is expected to marry his deceased brother's widow, ensuring the continuation of the family line and property rights. In sororate marriage, a man is expected to marry his deceased wife's sister, again maintaining family ties and alliances. Both systems emphasize the importance of maintaining relationships between families, rather than solely emphasizing the strength of individual marriages.

What Do Levirate and Sororate Marriage Systems Stress