rock the foundations of (something)

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rock the foundations of (something)

To impact something in a way that affects its very essence, especially concerning its values or beliefs. The death of her son rocked the foundations of her beliefs. The election of the outsider candidate rocked the foundations of the party, and led to a lot of soul-searching among its members.
See also: foundation, of, rock
References in periodicals archive ?
Redoubling his efforts to prove Hunt's innocence, he soon reaches a conclusion so shocking, it rocks the foundations of his existence.
and which, possibly, rocks the foundations of the Birmingham-Wolverhampton railway line tucked away beneath the vaults of Symphony Hall.