What instrument is the most popular?

[fielakind]

What is the most popular instrument of all times?

[naz_nomad]

The drum ... in it's various guises

[saxy_jag]

Do you mean most chosen, most played, most liked, oldest?

Percussion instruments have been around in one form or another since I don't know when - every society has a 'hitting' instrument of some description.

There's also the human voice, which I guess was around before our ancestors even learned to hit things.

However, what you'd have to define first is the point at which 'music' came out of just 'sound'.

[4getmenot]

Your voice