THE MAJOR CAUSE of World War I is NATIONALISM

Gave people the idea to form their own independent nations

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Led people to fight for the greatest industrial development.

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Led European nations to compete for the largest army and navy.

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It began in the 18th or 19th century which became more aggressive causing wars since the 20th century.

Country's tried to show their dominance and power over one another.

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Led to political conflicts

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