Conversation so far:
What areas of social activism was Carlos Delgado most interested in?
As part of the Navy-Vieques protests Carlos Delgado was actively opposed to the use of the island of Vieques, Puerto Rico as a bombing target practice facility.
Did Carlos Delgado protest in another ways?
In the 2004 season, Carlos Delgado protested the war by silently staying in the dugout during the playing of God Bless America during the seventh inning stretch.
Were Carlos Delgado's protests successful?
July 21, 2004, Carlos Delgado was booed by Yankee fans for his passive protest during a game at Yankee Stadium.
Did Carlos Delgado do anything for social activism besides protests?
Among other charity work, Carlos Delgado is well known for his generous visits to hospitals in his hometown where, on Three Kings Day, he brings toys to hospitalized children.
Does Carlos Delgado still do things for charity?
Carlos Delgado has also contributed to improving Puerto Rico's public education system.
How did Carlos Delgado contribute to their education system?
In 2007, Carlos Delgado participated an initiative sponsored by the non-profit Sapientis which brings distinguished public figures into classrooms to raise awareness of the education crisis in Puerto Rico.
Does Carlos Delgado do anything else for social activism besides raising awareness of the education crisis in Puerto Rico?
Carlos Delgado taught a class on Athletic Mental Training and Health at the Ramon Power y Giralt School in the Luis Llorens Torres public housing complex.
Did Carlos Delgado win any awards for social activism?
For his humanitarian efforts, Carlos Delgado was awarded the Roberto Clemente Award in 2006.

Question: What do you think was his greatest achievement?
Self-contained rewrite: What do you think was Carlos Delgado's greatest achievement in social activism?