Genuine question since I see this argument online with some regularity. Why don't you think the 2A belongs in a modern world? What does the time frame (modern vs not modern) have to do with human rights?
The forgotten premise of the 2A is that it would prevent tyranny by providing the tools so that the citizenry could demand that the government not form permanent external or internal security services beyond what was necessary for a minimal tripwire and training cadre force that would form the nucleus of an at-need force that would be sized up as situations presented with the militia and it's privately-owned arms. Liberty wasn't guaranteed by permitting the general citizeney arms to fight the central government at need, but by providing the tools so that the citizens could use the government to meet their security needs while keeping the general citizenry and not a distinct and separate peofessional warrior group as the necessary and essential component of the government providing that function.
The development of standing armies scaled to fight major wars rather than serve as tripwire and cadre forces, professional paramilitary law enforcement services, the professionalization of not just standing military forces but even the ready reserves, culminating in the all-volunteer force, have all rendered that design outdated.
The 2A might conceivably serve it's function in a modern world, but not in a country where the citizenry has accepted the changes the US has since roughly the second quarter of the 19th Century which have completely eradicated it's fundamental premise.
- Civilians today do not have the means to stand up to a modern state. For a minor example see https://en.wikipedia.org/wiki/Waco_siege, note the outcome was never in any doubt just how much casualties the feds wanted to inflict
- Weapons today have much larger damage potential
- We live in a world that violence and weapons are not part of the way it used to be, for the better. I don't think we are ready to go back to having to defend ourselves
- A strong and well armed democracy was hoped to be a better solution to this