To use the timeline feature for historical purposes (or, for example, to display family trees, etc.), users should be able to choose from time intervals of 1,000 years, 100 years, 50 years, 25 years, and 10 years.
Right now, it takes quite a bit of effort to use "thoughts," "types," and "tags" to achieve a good presentation and linking of such data sets.
Maybe all historians and genealogists could find happiness!