Why did prices drop for farmers before the great depression ?

The middle east had been subjected to attacks from outside the middle east in ancient, medieval, and modern times. which of the following invasions by outside forces came last in the period of written middle east history before 1300 a.d.?

Why did some african americans grow impatient with the leadership of the civil rights movement?

What does engels mean when he writes "everything which here arouses horror and indignation is of recent origin, belongs to the industrial epoch"?