The phrase "to change the world" means to make a significant and lasting impact on society, culture or human behavior. It implies taking action towards creating positive changes in various aspects such as social justice, environmental issues, political systems, economic conditions, education, healthcare, etc., with the aim of improving people's lives and making the world a better place to live in. The phrase can also refer to personal transformation or revolutionizing one's own life, which ultimately contributes towards changing the world at large.