This means you cannot do something without a certain thing. It shows that thing is very important.
Noun + なしにはPrimary
This means you cannot do something without a certain thing. It shows that thing is very important.
あなたの協力なしには、このプロジェクトは成功できない。
Without your cooperation, this project cannot succeed.
多くの人々の努力なしには、このイベントは実現しなかっただろう。
Without the efforts of many people, this event probably would not have come to fruition.
涙なしには語れない、感動的な物語だった。
It was a moving story that could not be told without tears.
お客様のご理解なしには、この度のサービス変更は進められません。
We cannot proceed with the recent service changes without our customers' understanding.
スマートフォンの普及なしには、現代社会はもはや成り立たない。
Modern society can no longer function without the widespread use of smartphones.
This grammar makes the thing it follows super important. It says this thing is a must-have. It is like saying, 'without this, nothing can happen.'
This is like "~なくしては" and "~を抜きにしては". They all mean "without something". "~なくしては" is a bit more formal. But "~はさておき" is different. It means to put something aside. You use it to talk about something else. It does not say that the first thing is needed for the second.
Don't use this when the next part is positive. For example, you cannot say "なしには できます" (can do it). The part after must be negative.
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