What theory changed the way you look at life?

 Here are some concepts that can fundamentally change a person's perspective on life:

• Evolution: Understanding the theory of evolution by natural selection can reshape how you view yourself and your place in the universe. It highlights the interconnectedness of life and the constant process of change.

• Complexity Theory: This theory explores how seemingly simple systems can give rise to complex and unpredictable outcomes. It can teach you to appreciate the interconnectedness of the world and the limitations of perfect prediction.

• Stoicism: This philosophy emphasizes accepting what you cannot control and focusing on what you can. It can provide a framework for dealing with challenges and finding meaning in life's uncertainties.

• Buddhist Philosophy: Concepts like impermanence (anatta) and interconnectedness (pratītyasamutpāda) can offer a new perspective on suffering and the pursuit of happiness.

Ultimately, the theory that changes your life depends on your individual experiences and what resonates most with you.