In order to fully understand Jiu-Jitsu, it is important to know where it came from.
Nic Greoriades of the Jiu Jitsu Brotherhood provides a brief and concise history of the art we have all come to love.
http://www.jiujitsubrotherhood.com/starting-brazilian-jiu-jitsu/a-brief-history-of-jiu-jitsu/