The modern theory is struggle for existence. There are troubles, and you try to save yourself, and survival of the fittest. But nobody is fit, nobody survives. Nobody wants death, but we are talking of survival. Who can escape death?: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.