Do you ever feel overwhelmed by all the people who need help? We’ve been deluged with one disaster after another—from hurricanes to mass shootings to the crisis of migrants seeking asylum. How can we remain compassionate and helpful? Researchers are discovering clues. Northwestern University’s David DeSteno, a psychology professor, uses the example of the Cajun Navy. These are a group of boaters who survived Hurricane Katrina, and then traveled from Louisiana to rescue others during Hurricane Harvey. They’ve also travelled to North Carolina and Florida to rescue people during floods. What motivated them to risk their lives, going back into a dangerous situation, rather than hiding in their current safe…