I feel we should sub divide that question.
"Primitive " innovations would have to include: (1) types of stone working, specifically, off the top of my head, flint working. (Plz look this up if it interests you, fascinating); (2) learning to create pottery/ceramics; (3) the beginnings of medicine, herbal and otherwise....... Most modern people do not give enough weight to the early learned skills. Oh, and (4) art, art separated humans from animals (re our mental abilities,not our innate worth), and was instrumental in our creating writing.

Fire, stone tools and the wheel after those everything else is just sprinkles on the icing on the cake.

Vaccines, gene therapy and the printing press. I see the press as the forerunner of both computers and the internet.

Newton's three laws of motion, antibiotics, pasteurization.

1. Fire (more a discovery and learning to use it for food, warmth, and light) along with agriculture
2. wheel
3. lever
4. Archimedean screw pump

Agriculture hasn't been mentioned, so I'll add that to the list. Without this, we wouldn't be able to feed the human plague that is destroying this planet.

That sounds very negative, so let me finish with a smiley face

• Aircraft which is capable of global wide travel.
• Birth control
• The internet

for humans - microscope - antibiotics - electricity.- [ then nuclear fusion as it may prevent small men with silly hats waging mass wars again]

Trick question!

A random 3 of top of my head.

Anaesthetic,can't imagine a world where there was none.

Discovery of Bacterial infections...saved countless lives

Gravity(laws of motion); we were all floating round in the air until Sir Isaac Newton discovered it.

axe, electricity , radio waves

Fingerprinting classification (1882)

Printing Press
Internal Combustion Engine
Computer

I think the question should be "What would you consider to be the 100 most important
technological advances in science ?

Vaseline, gasoline and urethane.

Artificial arms and legs, the human head transplant, and computers.

the blue led. trains and the gun.

The only one that springs immediately to mind is refrigeration.

Fiber optics, the transistor, the laser. All three opened up entirely new groundbreaking fields...