This document summarizes key concepts from Chapter 11 of the textbook "Human Geography: People, Place, and Culture" related to development models, theories of development, and barriers and costs of development. It discusses Rostow's modernization model and criticisms of the model. It then covers theories that consider context such as structuralism, dependency theory, and world-systems theory. The document outlines barriers to development like human trafficking, foreign debt, disease, and political instability. It also discusses costs of development including issues related to industrialization, export processing zones, agriculture, tourism, and uneven development within states.