There is Slavery in the 21st Century, it remains hidden because we don't wish to see or we don't believe it is happening or can happen. You can only fight what you choose to shine a light on. Fight Global Human Trafficking.
Human trafficking (or Trafficking in human beings) is a way to exploit people. People (Children, Women, and Men) are sold, bought, and traded like slaves. It is estimated to be a $5 to $9 billion-a-year industry. Trafficking victims typically are recruited by using force, coercion, deception or fraud is used, power is abused, or they are simply abducted. Threats, violence, and economic problems can often make a victim consent to exploitation.
Please start by following these organizations:
http://www.acf.hhs.gov/trafficking/
http://www.TheA21campaign.org; http://www.notforsalecampaign.org;
http://fairfund.org/;
http://www.traffickingproject.org/;
A more extensive list of groups/people on twitter follow this list http://bit.ly/mhL6Np