mankind review from sound gear:

Fac81- Once again another awesome band that I stumbled upon looking for new music on CDNow. I often use the cool little feature on their site that allows you to see what other people who have bought a certain album you may be looking at, have purchased also. This band has a sound musically of something hard in relationship to Pantera but with the vocals stylings of a band like Rage Against The Machine on steroids. This album has been out a little over a year but it is to be re-released in November with added songs and features. I love the hard driving tuneage and with tracks like Nanu and Ephedrine of which I down right totally love, this album rocks to the max. Its hard to believe these guys havent been hitting the charts by now. I expect this to be one of those truly popular underground albums that reaches the masses and sells albums but isnt heard on the radio or seen on Tv. If you enjoy allot of hard hitting vocals with rock solid music then go give these guys a listen. Definitely worth picking up and Blowing out a few tweeters with.

Upon their formation in 1997, the members of Factory 81 wanted to create a sound of stomp paced metal to hometown of Detroit, Michigan. Individually consisting of Andy Cyrulnik (drums), Kevin Lewis (bass), Bill Schultz (guitar) and Nathan Wallace (vocals), the quartet furthered their heaviness with an undertone of "new school" hardcore that was inspired by the likes of Earth Crisis, Hatebreed and Strife. This hybrid eventually resulted in the 1999 release of Factory 81's first album Mankind through Medea Records. The following year, the album was re-released with a bonus live track and technologically enhanced with previously unavailable performance cuts.

soundgear.com