How is the unemployment rate used as an indicator of economic health?

Ow does the point of view used in "battling the digital jolly roger" differ from "the completely free market" and affect the reliability of the article?

Was the civil war inevitable? could anything have been done through compromise to stop it, or did it have to happen?

Me i really need which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus