Why are there many "gaps" in world history? Can we get a continuous world History?

[Rafael Thundercat]

I was contemplating in the destruction of Alexandria Library, and many other Erasings in History. What a good way to mess up with Historical Truth, burning the records so we have a Gap that can be filled with anything the Survivors decide to be. 

There are actually a way to trace History and its interconections in a way to understand how did we came to the World Situation as we have today? 

Alexandria stand as a mark because imagine if there was some records there that would make us understand the whole drama of Christianity in a diferent view? What connections were lost? What about other hidden Valts of Records like Tibet,Vatican? Others? With Data important to unveil possible Historical lies? 

We see how even today with Desinformation in Mídia and Manipulation of News how much Conflic and Corruption are the consequences. So How much of the History that we came to know are accurate? Even the Data we have about our own life story? I myself cant remember everything and when I recover some data from my personal story I can see that I understand myself better due to remember that part of my story. So what if many of our civilization problems is due  historical Blindspots, by accidents and also on purpose.