The majority of human history has been written by the ruling class of the day. Transparency only seems to follow in the wake of their inevitable fall, usually at great cost in retrospective research via the oft thankless unraveling of threads of truth from their more copious fictions. Much like the machines we construct in our likeness, we too seem to get stuck in endless regressive cycles.
Folks in the "now" have always had a tendency to cling to their fictions as if they were truth for whatever reason; like nationalist exceptionalism, racial superiority, or religions rooted in "othering", etc. Humans seem to have an innate desire to fool themselves and trust in things they should not. Perhaps it's simply a sort of existential coping mechanism of living in a cold, unforgiving reality. We seek the comfort of lies.
Organizing around groups of trust, tends to lead to factionalism and conflicts. Knowing and trusting are sadly very different things in our species.