Would it be ethical to sacrifice one person to save many?

He did it at the expense of his health.

He did not sacrifice his life, nor did he sell out his organization.

He has endured sacrifices for America that most of us cannot begin to imagine.

Russia expresses regret for those lost in the hostage incident.

Thanks to the development of agricultural science, world food production has managed to keep up with population growth - but only at the expense of the future.