Which of the following principles is NOT part of the Garden Cities model?

The Garden Cities model, developed by Ebenezer Howard in the late 19th century, encompasses several principles aimed at creating balanced, healthy urban environments. One of the foundational tenets of this model is the integration of work and life, ensuring that residential areas are closely tied to employment opportunities, reducing the need for long commutes. Additionally, it emphasizes the preservation of open space, providing residents with accessible green areas that enhance the quality of life and promote communal interaction. Community involvement in planning is also central to the Garden Cities philosophy, as Howard advocated for the engagement of residents in the design and development processes to ensure that the community's needs and values are adequately represented.

Contrastingly, the idea of isolated living without green spaces directly contradicts the essence of the Garden Cities model. The focus is on creating interconnected communities that value nature and the environment, thus fostering a sustainable and sustainable urban living experience. Therefore, the principle of isolated living without green spaces does not align with the core values of the Garden Cities concept, making it the correct answer in this context.