but maureen costello of the southern poverty law center says there are ways to achieve all three.een costello, thank you for joining us. >> thank you. >> reporter: the southern poverty law center has a curriculum that looks at teaching tolerance in schools. what caused that to happen? >> well, before we started this program, we were fighting hate crimes basically. our founder was bringing civil suits against groups like the klan, and often these young men who had committed some terrible acts against others were motivated by terrible, terrible hatred and just complete misunderstanding of what other people were like. >> reporter: it was mostly race. >> it was usually race, although sometimes it was also ethnicity. he was seeing 19 and 20-year-old perpetrators who were going to spend the rest of their lives in prison, and he said, you know, we have to do something to stop this before it starts. and he said, we need a school program. that really was the beginning of teaching tolerance. let's find the best research we can find about how we can reduce prejudice starting at early ages an