Who was at fault during the Titanic sinking?

There are many factors that played into the sinking of the titanic but ultimately whose fault was it?

The R.M.S Titanic when it sunk (Image source)

A gigantic ship, almost 900 ft long and 175 feet high, it was a feat of engineering. The R.M.S. Titanic weighed more than 40,000 tons and it was the best ship in its time or was it? The Titanic was considered unsinkable at the time. The R.M.S Titanic was built by hundreds of Irish…