What Is Indoctrination?

Literally Indoctrination means: to instruct in doctrines,principles, theories or beliefs. When these are thought for the benefit of the society as is the case in schools and by parents it is on the right path.But when those theories are for propaganda purpose or per attacking others then that kind of indoctrination is bad for the society. In simple words it means forcing something in to your mind and that may be for good or bad.