Donald Watson was a man who thought very much about the food he ate. He was born in Yorkshire, England, in September 1910. And he died in November 2005, at the age of 95. That is a very great age. Watson explained that it was because he never ate any food from animals.

When he was a boy, Watson stayed on a farm. He loved to see the animals. He said that they gave so much to people. And all the animals were so friendly. Then, one day, he saw a man killing a pig. He was very sad. From then on, Watson decided that he would never again eat meat. Twenty years later he decided that he wouldn't eat anything from animals, such as milk, cheese or eggs. He became a vegan.

Watson formed a group called "The Vegan Society". In its newspaper, The Vegan Society thought it was terrible and wrong to eat food from animals. At first, there were not many people who agreed with him. They thought it was crazy to do it. Most people thought it was too difficult and unhealthy. However, over time, more and more people began to agree with Watson and The Vegan Society.

People become vegans for many reasons. Watson and his friend stopped eating because they loved animals. They believed that it was wrong to hurt another living thing.

Now, people also become vegans for environmental reasons. Keeping animals takes a lot of resources, including water and food. Also, in some places, people are cutting down trees to create more land for cows. By avoiding food from animals, vegans hope to protect these forest areas.

Finally, just like Watson, some people believe that being a vegan is healthier. They believe that food from animals causes heart problems, a high body weight and many other health problems.