I'm pretty sure Landmark and Scientology have alot in common. The link below is a taster as to how similar they are. Otherwise, google is your friend and will help you see That they operate by making you think you're a pathetic excuse for a human being and that only through their organization can you attain any sense of worth. Actually, that sounds like alot of religions/cults.
Landmark Forum & Scientology - [tmbchr]™