In this book, Harari explores the challenges and opportunities facing humanity in the 21st century. He covers a range of topics, including the impact of technology on our lives, the rise of nationalism and populism, and the future of work. Harari argues that in order to navigate these complex issues, we need to cultivate a sense of resilience, humility, and curiosity. He also emphasizes the importance of ethical considerations in our decision-making processes, and encourages readers to think deeply about the implications of our actions for ourselves and for society as a whole. Following are the 21 lessons from 21 century of Yuval Noah Harari:

Lesson 1: Change is the only constant 

Harari argues that the pace of change in the 21st century is accelerating at an unprecedented rate, and that we need to be prepared to adapt to these changes in order to thrive.

Lesson 2: The myth of free will

Harari challenges the idea that we have complete free will in our decision-making, and argues that many of our choices are influenced by factors outside of our control.

Lesson 3: The rise of artificial intelligence

Harari explores the potential impact of artificial intelligence on our society and economy, and urges us to consider how we can ensure that these technologies are used in a way that benefits humanity as a whole.

Lesson 4: The power of stories

Harari argues that human societies are built on shared stories and myths, and that our ability to tell compelling stories has been a key driver of our success as a species.

Lesson 5: The danger of tribalism

Harari examines the rise of nationalism and tribalism in the 21st century, and warns that these trends could lead to conflict and division if we don’t find ways to bridge our differences and work together.

Lesson 6: The importance of meditation

Harari suggests that meditation can help us develop a greater awareness of our thoughts and emotions, and can be a valuable tool for coping with stress and anxiety in the modern world.

Lesson 7: The future of education

Harari explores how technology is changing the way we learn and suggests that we need to rethink traditional models of education in order to prepare students for the challenges of the 21st century.

Lesson 8: The ethics of biotechnology

Harari considers the potential benefits and risks of biotechnologies such as genetic engineering and suggests that we need to establish ethical guidelines for their use.

Lesson 9: The role of religion

Harari argues that while religion has played an important role in human history, it is increasingly losing relevance in the modern world, and we need to find new ways of creating meaning and purpose in our lives.

Lesson 10: The crisis of liberal democracy

Harari examines the challenges facing liberal democracies around the world, including the rise of authoritarianism and the erosion of trust in political institutions, and suggests that we need to work together to find solutions to these problems.

Lesson 11: The future of work

Harari explores how technological advances are changing the nature of work and suggests that we need to rethink our understanding of what it means to have a fulfilling career in the 21st century.

Lesson 12: The importance of humility

Harari argues that humility is an essential quality for navigating the complex and rapidly changing world of the 21st century, and suggests that we need to be willing to acknowledge our own limitations and biases in order to make better decisions.

Lesson 13: The challenge of terrorism

Harari examines the phenomenon of terrorism and suggests that we need to adopt a more nuanced understanding of the motivations and strategies of terrorist groups in order to effectively combat them.

Lesson 14: The threat of nuclear war

Harari considers the risks associated with nuclear weapons and urges us to take steps to reduce the likelihood of a catastrophic nuclear war.

Lesson 15: The need for global cooperation

Harari argues that many of the challenges facing humanity in the 21st century, such as climate change and economic inequality, require global cooperation and coordination in order to be effectively addressed.

Lesson 16: The rise of dataism

Harari explores the idea that data and algorithms are becoming increasingly important in shaping our lives, and suggests that we need to think critically about the role of technology in our society.

Lesson 17: The challenge of meaning

Harari argues that many people in the modern world struggle to find meaning and purpose in their lives, and suggests that we need to find new ways of creating meaning in the absence of traditional sources of authority.

Lesson 18: The power of community

Harari suggests that cultivating strong social bonds and a sense of community is essential for our well-being, and that we need to find ways to foster social connections in an increasingly fragmented world.

Lesson 19: The importance of diversity

Harari argues that diversity is a key strength of human societies, and that we need to embrace diversity and work to create more inclusive societies in order to thrive in the 21st century.

Lesson 20: The limits of science

Harari examines the limitations of science and suggests that while science is a powerful tool for understanding the world around us, it is not capable of answering all of life’s most important questions.

Lesson 21: Resilience and resistance

Harari concludes the book by arguing that while the challenges facing humanity in the 21st century are significant, we still have the power to shape the future and create a better world. He suggests that building resilience and cultivating a spirit of resistance to injustice and oppression are essential for facing the challenges ahead.