The French Revolution was caused by several factors including Enlightenment ideas, an unfair tax system disproportionately burdening the third estate, inspiration from the American Revolution, financial bankruptcy, poor harvests leading to hunger, and the unpopularity of King Louis XVI and Queen Marie Antoinette. The monarchy's lavish lifestyle contrasted sharply with the suffering of the poor, fostering resentment. Overall, these elements contributed to a growing demand for change and revolution.