Diet around the world is growing more similar. National Geographic charted estimates of the similarity over time:
People increasingly eat the same types of food. They now get more calories from wheat, rice, corn, sugar, oil crops, and animal products. Meanwhile, consumption of grains such as sorghum, millet, and rye and of root crops such as cassava and yams has fallen.
Comparing diets by country, the international agricultural research group CGIAR tracked five decades of change.