Without the invention of nuclear weapons... I doubt we'd have nuclear power plants (which do power a lot of the world, USA included).
Say radiation in general... if we never discovered it, a lot of people would be dead, a lot of people now living wouldn't be alive (medical procedures).
But, if say the weapons hadn't been made, but then either of the other two had been discovered.... soon thereafter the weapon counterpart would've been developed.
Without rocket technology, warheads couldn't be fired from long distances... also, we wouldn't have television, news, or radio the way we do now either.
A pencil is just a pencil... until a murderer jabs it into the throat of their victim killing them, then it's a murder weapon.
Of course... crop rotation is a technology... shoes are a technology... clothing, food, refridgeration, air conditioning, bottled oxygen, water pipes, sewage treatment, roads, housing, paper, ink, ships, cars, telephone, etc...