Who wrote the mystery document?

The author of the mystery document is Upton Sinclair.

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.

cutting down of the rainforest

there are more than a million jobs out there

explanation:

they pay you money for doing work