Weapons are nothing but repurposed tools. Sometimes ‘enhanced’ to fit the new goal.

Clubs had started as fruit harvesting utensils, then used for hunting purposes and eventually for bashing in the heads of those who had slept with the missus when the wielders weren’t looking. And so on…

As a tool, an implement is used to ‘put things together’. As a weapon, the same (kind of) implement is used to ‘set things apart’. An axe can be used to split wood in order to build a fire or to ‘split’ furniture during a fit of rage.
Generally speaking, a tool is used towards the ultimate goal of adding to/fine tuning a structure while a weapon is used to destroy/disable something which is meant to remain so.

Our ability to communicate was ‘the’ tool which actually transformed us into what we are today. Humans.
At least according to Humberto Maturana. His theory maintains that we’ve become self-aware social individuals through what he calls languaging.
In a nut-shell, he says that we’ve become humans – self conscious apes, by continuously expressing our thoughts towards the other members of the community. Hence simultaneously building an ‘agora’ and ‘walling in’ individual private spaces.

Yet the same ability to communicate can be used also as a weapon.
Instead of being used by individuals to mutually groom themselves, and ultimately adding to the overall resilience of the community, ‘weaponized’ communication is used to ‘downgrade’ susceptible individuals. Hence lowering their ability to coalesce into functional communities.

History suggests that, in the longer run, democracy – as a manner of decision making, increases the survivability of the communities which use it. Simply by pooling the decision making resources of the entire community instead of relying on the mental prowess – and good will, of a single authoritarian leader.
Only for democracy to be fully functional, the individual members of the community have to be able to share, in earnest, their thoughts.
This is why Freedom of Speech has been enshrined in the First Amendment.
That’s why whenever the public discourse becomes increasingly dominated by ‘fake-news’ things start to go south.

That is why whenever people allow themselves to be split into warring parties – with no real communication between the sides except for the misinformation hurled across the divide, both sides eventually end up wondering at the destruction they had allowed the ‘communication warriors’ to inflict upon them.