This is the 1908th most frequent Turkish word.
insanlığın
"Humanity's" or "of humanity."
Here, 'insanlığın' is again in the genitive case, indicating that the history described belongs to humanity.
Bu kitapta, insanlığın tarihindeki önemli dönüm noktaları anlatılıyor.
This book narrates the important turning points in humanity's history.
In this case, 'insanlığın' denotes the benefit that is intended for humanity, showing possession or association.
İnsanlığın yararına çalışmak, hepimizin görevi olmalıdır.
Working for the benefit of humanity should be everyone's duty.
In this sentence, 'insanlığın' is used as a genitive (possessive form) to describe the future belonging to humanity.