To see what older points of view were. To factualize certain things and sometimes it’s to save our history paining us in a good light instead of a bad light...or just cause we’re dumb
Money, resources, soldiers, allies
Since the population decreased, I'd say D-It greatly depleted the continent's workforce .
This speech is a primary source.
It is a primary source because it is a fragment from the event that was happening at that moment and because it is a direct expression of a figure that was active in such an event, i.e., women's movement.
The other questions are wrong because: there isn't such thing as a neutral source; a secondary source is a work of history produced by a historian that studied primary sources and analyzed them; as for unreliable, no source is completely reliable nor completely unreliable -- it always depends on what we are asking of it.