Since their inception in 1993, Bone Thugs-In-Harmony have sold over 30 million records over the 11 studio albums and 5 Greatest Hits packages and compilations making them one of the most successful and prolific hip hop groups of all times. Known mostly for their unique flow and lyricism, Bone's style and technique can be described as melodic, rapid-fire and aggressive. Their flow is often interwoven at a high-speed, melodic pace or slow, harmonic pace. Their subject matter includes other topics such as urban socio-political issues, and religion. They have been out spoken and major advocates of the legalization of marijuana in California and beyond. In addition to their joint projects each member has released at least one solo CD.