Are you

A computer?

Useless alone, but deadly in numbers.

A computer by itself is not much, but when it is connected on a network or the internet with all the other computers of the planet it really shines!
Deadly in numbers could also refer to a dos attack from computer "zombies" for the tech savvy out there.

I am at the heart of connection.

Connects everyone through the internet.

Me and my friends are at the root of modern society.

computers and information technology is what drives all the recent advancement in technology.

We operate your second brain, Humanity's hive mind.

Google is pretty much like a second brain to me. The hive mind refer to our our knowledge is all shared between us and seems like we think as a collective... Like the Borgs(for those who understands the reference :P)

Are you

A computer?

Useless alone, but deadly in numbers.

A computer by itself is not much, but when it is connected on a network or the internet with all the other computers of the planet it really shines!
Deadly in numbers could also refer to a dos attack from computer "zombies" for the tech savvy out there.

I am at the heart of connection.

Connects everyone through the internet.

Me and my friends are at the root of modern society.

Computers and information technology is what drives all the recent advancement in technology.

We operate your second brain, Humanity's hive mind.

Google is pretty much like a second brain to me. The hive mind refer to how our knowledge is all shared between us and seems like we think as a collective... Like the Borgs(for those who understands the reference :P)

Are you

A computer?

Useless alone, but deadly in numbers.

A computer by itself is not much, but when it is connected on a network or the internet with all the other computers of the planet it really shines!

I am at the heart of connection.

Connects everyone through the internet.

Me and my friends are at the root of modern society.

computers and information technology is what drives all the recent advancement in technology.

We operate your second brain, Humanity's hive mind.

Google is pretty much like a second brain to me. The hive mind refer to our our knowledge is all shared between us and seems like we think as a collective... Like the Borgs(for those who understands the reference :P)

Are you

A computer?

Useless alone, but deadly in numbers.

A computer by itself is not much, but when it is connected on a network or the internet with all the other computers of the planet it really shines!
Deadly in numbers could also refer to a dos attack from computer "zombies" for the tech savvy out there.

I am at the heart of connection.

Connects everyone through the internet.

Me and my friends are at the root of modern society.

computers and information technology is what drives all the recent advancement in technology.

We operate your second brain, Humanity's hive mind.

Google is pretty much like a second brain to me. The hive mind refer to our our knowledge is all shared between us and seems like we think as a collective... Like the Borgs(for those who understands the reference :P)