What is the origin of the idiom "turning point" and when to use it?

The phrase "turning point" does not have a specific origin tied to a particular person or historical event. It is a common expression that evolved over time to describe a pivotal moment of change or transformation. The concept of a turning point in a narrative or in life situations has been recognized and expressed in various forms throughout human history. As such, the phrase has become a widely understood and used expression in the English language. It is often used when describing pivotal moments in personal journeys, such as a life-changing decision, a transformative experience, or a critical event that alters the course of one's life.