HISTORY OF PLANETARY CULTURE

In the beginning of the colonization phase, groups of clones would populate cities, and each city had an identical set of clones. As such these people function as the originators of the ethnic groups that exist today. Over time, after the collapse of the colonization effort these clones began to seek each other out and form groups of themselvesm reinforcing a cultural identity that solidified over time into city states, countries, nations, ethnicities that intermarried eventually, but never lost dominate traits, alleles, etc.

These ethnicities now roughly coincide with the specializations they brought to the teams in the colonies. There is a race of martial people, men and women who became the primary military class. There is a race of logisticians who became merchants. Nautical folks who became seafarers. Field commanders who became the patrician ruling class. Many were biologists of different sorts who became the laboring agriculture class, working with animals and farms. Engineers became what else, but new, magic engineers using their newfound powers to supercharge their work.

There are groups known for the industriousness. Some who are viewed as idle and lazy. Some who are viewed as untrustworthy and craven. Some who are unstable and prone to crime. Some who are geniuses, born to rule. Some who are calm and dependable. Some who are aggressive and noble. Some who are meek and pliable.

They still intermarry, but tend to stick to their groups, finding excuses to dislike the others. It's generally flipped from how it is in real life:  whites are viewed as lazy, prone to crime. Their pale skin and pinched features marks them as dangerous and feral. They don't really do anything to shake this negative stereotype, or at least it seems that way to Jane at first. Most of The Less are white, and so most of the population that goes without sleep and resorts to crime looks a certain way. Ginger, blonde, brown hair, etc.

Much of culture has of course been influenced by past and present dome conditions. Some domes are snowy, some are hot and desert like. Some are a jungle, some are rainforest, some are overflowing with water.