People are becoming increasingly divided and tribal once again, making the idea of a single unified global ethnicity unlikely. While a melting pot dynamic may apply at the national level in some cases, on a global scale, genetic isolates and non-mixing populations will likely continue to exist. However, too much genetic homogeneity can lead to evolutionary stagnation or even collapse, as genetic diversity is essential for long-term adaptability and survival. Without it, populations become more vulnerable to disease, environmental changes, and other existential threats.