The lifeblood of a society or community is the blood that flows through it. It is the force that keeps it functioning, and it is essential for the survival of the group.
The lifeblood of the community is the shop owner.
The lifeblood of the society is the government.
noun
an essential or life-giving force
noun
the blood considered as the seat of vitality
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It is the tool of my trade, the ethereal lifeblood of my mind.
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That's the lifeblood ofWikipedia.
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They are the lifeblood of the project.
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They are the lifeblood ofWikipedia.
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Articles are the lifeblood of this site.
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Redirects are the lifeblood of the encyclopedia.
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POV is the lifeblood of this project.
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Tourism is the lifeblood of the village.
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Dynamic accents are the lifeblood of the sweep.
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Hollywood's lifeblood was the movie cliche.