Sun Tzu’s Art of War. is war justifiable or necessary ? how is this book helpful today? in social/everyday/ political and/or community context

The writing is about Sun Tzu’s “the Art of War” book.
the response should be based on this two questions: is war justifiable or necessary ? how is this book helpful today? in social/everyday/ political and/or community context .
It can have 15-20 quotes from the text, that might include few outside quotes if its need as long as they are related or support the writing.