Era before 90s-A necessary review

While a lot is being talked about the era after 90s and rightly so, don't you people think that to make an unbiased analysis, the era before 90s should also be talked about. The FEP happened in that era. Only when we have the complete analysis , we can be developed. And i fell talking only about jungle raj starting from 90s is partial analysis. I feel that bihar is beyond lalu nitish. And the only reason we have these two options is that we only analysed jungle raj and due to that both of them have have become antidote to each other. So my question is What was bihar like before 90s?