'World's' in the Bible

It is he who is the atoning sacrifice for our sins, and not for ours only, but also for the whole world's.

For all that is in the world, the lust of the flesh, the lust of the eyes, and the pride of life, isn't the Father's, but is the world's.

But whoso hath this world's good, and seeth his brother have need, and shutteth up his bowels of compassion from him, how dwelleth the love of God in him?

These people belong to the world. That is why they speak from the world's perspective, and the world listens to them.