We as humans define what numerals are and how they relate to objects and their value. Take any human civilisation you like from just about any period in our history, since the invention of number systems. Place any number of, say, pebbles on the ground before a local and s/he will know instantly that there are a specific number of them. They may not use one, two, three and so on; they may say wa', cha', wej (as the Klingons would if they were real) but the person would know how many items are represented. Now add another number to the pile and your friendly local will understand that you have created a new and larger number. If you equate each pebble with some other item in their world, let's say cows, you now have a tally system for keeping track of the number of animals you have. This stuff is so basic most people seem to grasp it around about the same time as they learn to talk.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'