Not a good one. Objective history book would be a timeline. To add another thing interesting (eg cause and effect) is to make decisions and introduce bias.
No, not necessarily. From the events you go to the chains of events, the clusters, the trends, the teachings etc.
Similarly to experimental science, where you go from the protocols ("this happened there then") to the "laws".
The role of «decisions and bias» could be limited, with some similar quantitative, and maybe collaborative (aggregation of multi-agent contribution) approach that ranked the outputs through a computed importance.