lost to the world

[I]t seems this Method is of late grown out of Practice, and so like the melting of Marble and the painting of Glass, ’tis laid aside among the various useful Arts which History tells us are lost to the World.

He was a sympathiser to the poor, the suffering, and the oppressed; and by his death, one of England’s greatest writers is lost to the world.

Miss Ambient, whom I also saw at intervals during the time that followed, has, with her embroideries and her attitudes, her necromantic glances and strange intuitions, retired to a Sisterhood, where, as I am told, she is deeply immured and quite lost to the world.

When he reached the manse he went to his study and took down a bulky volume. […] He remained immersed in its mazes until dawn, struck a new trail of speculation and pursued it like a sleuth hound for the next week, utterly lost to the world, his parish and his family.