Anderson Cooper 360

Tonight on AC360: The Bully Effect

In anticipation of tonight's documentary, "The Bully Effect," we've heard from many of you on Facebook and Twitter and AC360.com. There's a clear common thread from people representing different age groups, ethnicities, locations, and background: we must take action to prevent children from suffering at the hands of bullies.

As Anderson Cooper wrote in an op-ed today, empathy and understanding are the weapons we need to give kids to combat destructive behavior. Bystanders need to stand up for those who cannot stand up for themselves. Every child deserves to go to school and grow up in a safe environment, free from threats and harassment.

In the documentary, created in partnership with Cartoon Network, you'll meet four people whose lives have been changed because of bullying. Their stories are as heartbreaking as they are inspirational. Three of them – Alex, Kelby, and Kirk – were featured in the movie "Bully," released in 2012. Lee Hirsch is the director and producer of "Bully" who has become an activist and advocate for victims. Tonight you'll see how they've all transformed since the movie was filmed.

Anderson, Kelly Ripa, Lee Hirsch and Cartoon Network President Stuart Snyder discussed the documentary, how the Internet has become a source of cruelty for kids who are bullied, and how the movement to end bullying is reaching a tipping point. Watch a preview of their conversation and see more at 8 p.m. ET.

Tune in for "The Bully Effect" at 10 p.m. ET.

If you or someone you know is experiencing bullying or harassment, please reach out for help. Here are some organizations that can assist you or provide educational resources:

The Bully Project

Stand for the Silent

Stop Bullying Speak Up

Facing History and Ourselves

Suicide Prevention Lifeline

The Trevor Project

Pacer Center