Our human-mind set dictates how we see the world and create the language.
‘Ontological categories’, such as people, things, actions, events, provide a universal initial structure of the language of thought on which language is based.
The innate thought structure also covers the way in which words may be combined.
e.g. The cat sat on the mat. The dog lay under the table.
not: The mat lay under the cat. The table stood over the dog.
=> The location of ‘small onto large’ may be due to the human mind-set. Human thoughts run along certain routes, which are likely to affect the order of participants in a grammar.