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The sentence is

> 現代ほど自分の主体性、価値観を築き上げる **のに** 難しい時代はないのである。

If I understand correctly, the sentence can be simplified to

> 現代ほど難しい時代はない (There is no time period as difficult as now)

The entire sentence tells you that the difficult thing is building one's own
independence and values, but I don't understand how the のに is supposed to fit
grammatically in there. My best guess is that the middle part is somehow an
adverb modifying 難しい.
CC BY-SA 3.0
2013-12-22T22:55:43.863
13834
2018-04-09T03:06:12.980
2018-04-09T03:06:12.980
9831
3221
question
grammar particle-に particle-の
Help with のに construction in a sentence
This のに means "to" or "in order to".

The の nominalizes the verb 築き上げる.

～～に means "to do ~~" or "for doing ~~".

You are right; The whole middle part modifies 難しい.

"There has never been a more difficult time than the present time for building
one's own identity and sense of values."
CC BY-SA 3.0
2013-12-23T00:16:29.767
13838
2013-12-23T00:16:29.767
13834
answer