What is the most deadliest weapon in the world?

Answer 1

a hydrogen bomb. it explodes above the site of impact, and removes all the oxygen in a large given area. Its about 2-3x deadlier than an atomic bomb.

While impressive, nuclear weapons pale in comparison to advanced weaponized biological diseases. Nuclear weapons specialize in blast damage, and kill primarily in direct proportion to their blast strength, with some after-effects from fallout. All effects, however, are very time-limited. Biologicals, however, have no limit on their killing potential, as they are transmitted between humans organically, and can continue to kill virtually indefinitely.

A modern high-tech biological weapon can possibly kill billions of people from only a few ounces of material, properly dispersed.

Weaponized smallpox, hemorrhagic fever, or influenza strains are commonly discussed in the category of weapons capable of killing the entire human race. Nuclear weapons, even when used in large quantities, are very unlikely to cause the extinction of human beings. Modern human civilization, yes, but not all human life. Weaponized biologicals easily have that potential.

For comparison, studies from RAND (one of the US Military's primary think-tanks) done in the 50s and 60s (when the number and size of nuclear stockpiles was almost 10x what it is now), predicted that a full-scale nuclear exchange (20,000+ warheads, ~10,000 MT yield totals), followed by second-system effects from fallout, fire, civilization collapse, etc, could lead to 50-60% of the US and USSR populations being dead after 1 year of an exchange, with probable similar casualties in Europe, but relatively few deaths in non-involved countries (fewer than 10% of the rest of the world), with a total global death count of 15-20%.

A similar scenario for use of biologicals against a fewkey points in Europe, Russia, and the USA (no more than half-dozen in each) with the more-primitive biological weapons of that time period, predicted a minimum of 95% deaths within a year, rising to probably 99.999% within 10 years, WORLDWIDE. That is, after the limited release of a potent biological in no more than 20 places in only the combatant nations, within a decade, less than 1 in 100,000 people would be expected to be alive. That means, for a country the size of the USA, 3,000 people would remain in the entire country, while Canada could expect to have 350 people alive, and even China would likely have fewer than 13,000. Total worldwide population would drop from 7 billion to 70,000, which is roughly the human population of the earth at the end of the last major Ice Age.