Existing borders restrict natural migration patterns from "summary" of The Next Great Migration by Sonia Shah
When humans draw lines on a map, they are not just marking territory; they are also creating barriers that disrupt the flow of life. Animals, plants, and even microbes have been migrating for millions of years, following the rhythms of the Earth and the changing conditions of the planet. But when humans erect fences, walls, and other boundaries, they impede these natural migration patterns. These restrictions have devastating consequences on the environment. For example, animals that used to roam freely across vast landscapes are now confined to isolated pockets of habitat, leading to inbreeding, loss of genetic diversity, and ultimately, extinction. Similarly, plants that once dispersed seeds over long distances are now trapped in fragmented habitats, unable to adapt to changing climates or diseases. But ...
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