A stable pro-Western Egypt has been the bed rock of our Middle East policy since Henry Kissinger.
also bed-rock, 1850, from bed (n.) + rock (n.). Figurative use by 1869; as an adjective by 1881.
: a bedrock discussion/ bedrock decision
The asi facts; the crucial elements; the BOTTOM LINE, the NITTY-GRITTY
[1870s+; fr bedrock ''the solid rock underlying strata and detritus'']