sense of duty

He is only willing to do so from a sense of duty.

She didn't want to talk to anyone, had come only from a sense of duty, something no one would thank her for.

What you have created is a man with a strong sense of duty.

It was only his sense of duty that kept him in office.

I do it from a sense of duty for my country.

"But I also had a sense of duty to my family."

For all your tough talk, you do seem to have a sense of social duty.

Clearly you feel no sense of duty to your own kind, nor to me.

Yes, she feels a sense of duty to the group.

His sense of duty allows him to do no less.