Dhammika Dharmapala is a special person who is very interested in studying the rules that help people live a good life, called dharma. He studies how these rules are different in different places, like Sri Lanka, which is where he is from, and the United States, where he works as a professor.
Dhammika likes to use his knowledge to help people. For example, he might help a government make fair laws, or help people understand how they can treat other people nicely. He also likes to learn from other people, so he talks to lots of different people from different places and listens to their ideas.
In short, Dhammika Dharmapala is a wise person who likes to learn about how we can all be good to each other, and uses his knowledge to help the world.