I will show what process I would use to make your example sentence less passive. Your example sentence is:
In a country known for its collective thought, the individual is rarely brought into the spotlight,
First, to identify a passive sentence, look for any verbs or actions and see if you can determine who is performing them. Passive voice in a sentence often reveals itself when you can't identify who is performing those actions. In your example sentence, I would ask myself: Who knows about the "collective thought the country has" and who "rarely brings the individual into the spotlight?".
Once I notice the lack of actors for those two actions, I can make the sentence less passive by including the missing information. In this case, I chose some arbitrary actors ('sociologists' and 'journalists' in this case). My re-write of the sentence inserts these actors into the sentence, and results in:
In a country known (by sociologists) for its collective thought, the individual is rarely brought (by journalists) into the spotlight.
This version of the sentence is no longer passive but to rewrite it in this way requires you to know who is performing the actions. You can use passive voice if you either don't know or don't care who the actors in your writing are. But if you do know, or your readers might care who the actors are, it is better to include that information.
This article on the passive voice from the University of Toronto shows some examples of when you might want to use passive voice sentences.