The complexity of cancer, with its bewildering variety of forms, makes devising treatments difficult. But progress is being made https://www.economist.com/briefing/2025/07/17/the-world-is-making-impressive-progress-averting-cancer?taid=69facae70fdc87000175aec5&utm_campaign=editorial-social&utm_content=discovery.content&utm_medium=social-media.content.np&utm_source=voante