Michael Strauss, a philanthropic force in San Diego who spent decades infusing his community with art and charitable giving, has passed away. He was 91 years old. The legacy he left behind is an undeniable tribute to his enduring curiosity — for new areas of knowledge and the many lives he touched, family members said. Strauss, well-known for his and his wife’s substantial contemporary art collection, didn’t just travel the world to find new artists.