"like" and "as" When should i use "LIKE" and when should I use "AS"?

The slavery where is the line between the concept of juridical slavery and the concept of factual slavery? That line is determinated by the juridical rules. That means if the law (precedents or acts/statutes) recognizes the slavery considering a human an object of propriety right we have a country with slavery otherwise we haven't that kind of country. So what is the factual slavery? Could be exist a society with factual slavery without a juridical slavery? That depends by the definition we give to the slavery. If we intend that just as consideration of the law that humans can be object of propriety right (so we can trade humans legally) we can't have a factual slavery. That means factual slavery can't exist. But, we should imagine a man without any propriety who has just his workforce as a resource, nothing more. This man has just one alternative: work for a factory or die for poverty. That was the situation in the England of 1500 (where mendicants were killed with the capital punishment by the authority). Can we say that is a real alternative? I think that is a formal alternative, as the option a criminal gives to someone, saying "give me your money or I will kill you". The self-same law states the annullability of a agreement where one of the part is threatened. So are we sure factual slavery doesn't exist and it is just a hot expression which the journalists love write to ingratiate the reader? (please, tell me the difference between "juridical" and "legal" if there is)