Science. Technological development. Research. Engineering. Writing. Language. Cooperation. Democracy. Diplomacy. Love. Ethics. Philosophy. Farming. Industrialization. Markets. Shipbuilding. Electronics. Masonry. Metallurgy. Flight. Medicine.

If you want to see examples of "solutions" to human problems other than violence, you need only to open your eyes and look around.

Some good candidates:

Talking.

Giving up.

Waiting.

Doing the math.

Bringing in a third party.

Reading.

Experimentation.

Taking a nap.

Eating.

Spending money.

Machining.

Being nice.