Helping poor nations adapt to environmental shocks they didn't cause.
Development economics is the study of how economies in low-income countries can be transformed to improve the quality of life, self-esteem, and freedom of their populations
is an interdisciplinary field that examines how low-income nations can improve their economic, fiscal, and social conditions to become high-income countries. Unlike standard macroeconomics, it focuses on structural transformations, poverty reduction, and the quality of life rather than just Gross Domestic Product (GDP) growth. Core Dimensions of Development
This is why is considered a modern classic.
Development Economics: Theory and Practice (2nd Edition, 2021) by Alain de Janvry and Elisabeth Sadoulet is a comprehensive textbook designed to bridge the gap between academic economic modeling and the "messy" real-world application of development policies.