Here is an excerpt from a book I’m reading:
Unless consumed in highly skilled ritual contexts, as is practiced in many traditional societies, what drugs in fact do is reduce our perception of both what can be accomplished and what we as individuals are able to accomplish, until the two are in balance. This is a pleasant state of affairs, but it is only a misleading simulation of that enjoyment that comes from increasing opportunities for actions and the abilities to act.
Can anybody help me to interpret these lines, as the usage of unless and until seems quite complex?