Paulo Freire was a Brazilian educator and philosopher born in 1921. He is known for his theories on critical pedagogy and ideas of "conscientization", or developing a critical consciousness. Freire believed that education should empower the oppressed and promote dialogue between students and teachers. He saw education as a practice of freedom that could transform society. Freire authored many influential books on critical pedagogy and his theories have shaped educational philosophies worldwide. He died in 1997 after making significant contributions to educational thought.