History can be divided in pre-classicism, classicism, modernism, and postmodernism. Pre-classicism is a collection of knowledge accumulated over hundreds of thousands of years until Greece, classicism over few thousand years since Greece, modernism over a century or so since 18th century, and postmodernism over few decades in the second half of 20th century. Classicism, modernism, and postmodernism removed some knowledge from previous periods, causing a drastic contemporary reduction in knowledge and increase in risk and values.

Metamodernism, coming after postmodernism, aims to restore the lost knowledge from each period making it available for contemporary use. This is enriching knowledge from each of the periods making it safer and more valuable. Modernism and postmodernism especially had little time to develop knowledge yet have great power and are therefore very unsafe. Their risks and quality would be lowered by adding pre-classical and classical knowledge.

Knowledge can be defined as an ontology. Language is the dominant ontology management method in contemporary systems. It is more effective than imagery and other methods because contemporary systems depend highly on abstract yet precise ontologies. Therefore ontology, knowledge, and language are one in this article and will be presented by the “ontology”.

If a goal of a system is to increase collective intelligence and consciousness, system changes should be observed through ontology changes. Ontology changes between traditionalism, modernism, and postmodernism show what kind of language is needed for metamodernism and openness to increase collective intelligence and consciousness.

Traditionalism had a stable ontology. Modernism rapidly expanded the traditional ontology by adding to it and rarely changing it. Postmodernism is mostly focused on changing traditional and modern ontology, adding little to both. Postmodernism depends on closed centralized power to create these ontology changes.

Metamodernism and openness should direct ontology development towards following goals:
– Postmodernism expands instead of changes traditional and modern ontologies,
– Ontology changes are more open and less centralized,
– Adoption of non-binary (oscillating) ontologies.

If ontology development is directed towards these goals a system will experience increase collective intelligence and consciousness growth, and will avoid reductive conflict caused by closed and centralized ontology changes.