Context from my TOEFL reading book. But the myths that have grown up around the rites may continue as part of the group’s oral tradition and may even come to be acted out under conditions divorced from these rites. When this occurs, the first step has been taken toward theater as an autonomous activity, and thereafter entertainment and aesthetic values may gradually replace the former mystical and socially efficacious concerns. ******************** Hi all. I hope you are all having a great day I've just come across this part in my TOEFL reading book and kind of got stuck. What does the author exactly mean by 'the first step has been taken toward theater' and 'efficacious?' Does it mean something like 'one turns to theater when this occurs?' Also, I'm quite aware of how this forum works and tried to observe the rule: look for dictionary before you post. But, I'm still lost on 'efficacious' even after consulting several dictionaries. It just does quite collocate well to say 'socially efficacious concerns'.