By: Erik Davis

He introduced “outsideness” — cosmic dread — to science fiction.

By: Joshua Glenn

The 1874-83 cohort travel far and wide in search of new visions.

By: Joshua Glenn

The 1864-73 cohort is a lost generation of absurdists and experimenters.

By: Joshua Glenn

The 1854-63 cohort are spelunkers, in search of deep truths.

By: Joshua Glenn

The 1844-53 cohort overreached — and worried about it.