ELI5 mode
A crusader is a determined individual who fervently champions a cause, often taking bold actions to drive change and overcome opposition. Historically, it describes the medieval Christian warriors who embarked on religious expeditions to the Holy Land during the 11th to 13th centuries. In today's world, the term is commonly used for modern activists battling social injustices, environmental issues, or ethical reforms with unyielding zeal.
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