In my book I have two types of people that take up 1/4 society population which are clones and slaves. There is large industries that make large profits off both markets. I'm trying to think of ways where why would common people or customers would choose clones over a slave, and how they could both stand out being different in their own unique ways, and how to seperate them from "Normal people". With slaves their mostly consisted of being either being born as one,kidnapped, captured criminals/pirates, war criminals, deserters, or just being unwanted by other familes. With Clones, I'm trying to make them stand out different than a slave, because in a sense a clone is a slave, and why someone would choose a clone than a slave? Best thing I can think of is there more treated as a common person in society because their designed to be obedient, and have no independent free thinking. Thing is what stops that clone from learning, and adopting when someone hints them to get them the idea to start questioning. With clone farming, I could make a clones more expensive to purchase for more specifications, with high regulations, and taxes. Also trying to seperate both slaves and clones purposes in services. With slaves it's pretty easy, men are usually used for fighting/killing, ones with no skills work in refinaries or pleasure. As for women is with more cleaning, prositution or personal pleasure, and having ability to produce more supply of slaves. Then with controlling supply from going overboard. With clones I can only think of people ordering their own personal clone for themselves could be any reason as if a family member died, implant their memories or just simple pleasures or as for men is military purposes producing mass quantity. Then comes the toucy sensitive topic- child slavery, and I'm really debating if I should leave that topic out, and let the reader come up with their own assumption or have a vague description like having higher & strict regulations, and laws what they can and can't do. Have corporations that could house them, making them proper slaves, and seperate care taking, and could only be used for minor services like cleaning then when they turn 18 then their sold on the market almost like cattle. Reading alot history on slavery in Rome I know slave elders looked after their own kids for minor services like cleaning or helping them prep food or their masters used as their own personal "Cupids" which was accecpted back then.