The need for settled life arose due to various factors that impacted the lives of early humans. Let's explore the reasons in detail:

**Availability of Resources:**
- Early humans were primarily hunter-gatherers, constantly moving in search of food and water.
- Settling down in one place allowed them to exploit local resources more efficiently and reliably.
- They could cultivate crops, domesticate animals, and establish a steady food supply.

**Climate Change:**
- Climate change played a significant role in the transition from a nomadic lifestyle to settled life.
- As the climate became more stable and predictable in certain regions, it became feasible for early humans to establish permanent settlements.
- This allowed them to adapt to specific environments and develop specialized skills.

**Social and Cultural Evolution:**
- Settled life led to the development of complex social structures and cultural practices.
- People began to establish communities, enabling them to share knowledge, skills, and resources.
- Specialization of labor became possible, leading to the growth of various crafts and trades.

**Technological Advancements:**
- Settled life facilitated the development and refinement of tools and technologies.
- Early humans could invest more time in perfecting their tools, resulting in better hunting, farming, and building techniques.
- This led to increased productivity and improved their overall quality of life.

**Security and Protection:**
- Settled life provided increased security and protection against predators and other hostile groups.
- Early humans could build more permanent structures for shelter and defense, creating a sense of safety and stability.

**Advancements in Communication:**
- Settled life allowed for the development of more sophisticated forms of communication.
- Early humans could share information, stories, and experiences more easily within their settled communities.
- This facilitated the transmission of knowledge from one generation to another.

In conclusion, the need for settled life arose due to the availability of resources, climate change, social and cultural evolution, technological advancements, security concerns, and advancements in communication. Settling down in one place provided early humans with stability, increased productivity, and the opportunity for social and technological progress.