I don't think these are mutually exclusive. In fact, I'd argue that taking care of your family _is_ a morally right and meaningful way of contributing to the w

I don't think these are mutually exclusive. In fact, I'd argue that taking care of your family _is_ a morally right and meaningful way of contributing to the world. There's a reason traditional Christian ethical frameworks often prioritize responsibilities in layers: first to God (or core principles), then to family, then to the neighbor (broader community).