Increasing rates of obesity and diabetes in the twentieth century, particularly among aboriginal populations, may be linked to possession of a "thrifty gene" that was an adaptation to food supply uncertainty and food shortages in our evolutionary past.

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This is a commonly supported theory in the field of evolutionary biology and genetics. The "thrifty gene hypothesis" suggests that certain populations may be more susceptible to obesity and diabetes due to genetic adaptations to food scarcity in the past. However, it is important to note that this is not the only factor contributing to these health issues and lifestyle factors such as diet and physical activity also play a significant role.

Increasing Rates of Obesity and Diabetes in the Twentieth Century