Germany was blamed for world war 1. The treaty of Versailles in 1919 restricted Germany in many ways, such as them paying war reparations, taking blame for the war, losing colonies they were imperialistic towards, and not being able to construct a large army.
Without the consumer the world would probably be overpopulated with something.
Ex: Spiders eat flies. If there were no spiders there would be too many flies.
Hope this helps.
C. because i looked it up and i’m not writing a 20 words sentence to give you this answer,Thank you!