Comment by contingencies

Overall this list skews ridiculously to western classicism, and misses a great many more significant intellectual achievements. Here's some nobody's mentioned.

Mechanics: wheel, lever, screw, gear trains, cam/follower, crank‑slider, water/wind mills, mechanical clock, printing press, and the steam engine.

Every advance in basic metallurgy. Controlled smelting, casting, hot forging, alloying to make bronze, carburising to make early steel, blooms and bloomery furnaces, quenching/tempering, wrought‑iron forging, large‑scale iron production, advanced steels.

Coinage.

Sail.

Plumbing.

Refrigeration.

Plastics.

If you take the position these are not intellectual achievements, I think you under-appreciate how revolutionary they were at the time.