At any cost

"Though we face an enemy that will not stop until out entire civilization ceases to exist, it's important we not abandon the principles of basic morality. The kett must be defeated, but not at any cost. It won't matter if our future generations can live without fear or death or enslavement, if that freedom was achieved through genocide or other barbaric crimes..."

Source: wiktionary

From an operational nuclear facility, Sellafield turned into a full-time storage depot – but an uncanny, precarious one, filled with toxic nuclear waste that has to be kept contained at any cost.

Source: wiktionary