Since all these are changes in how we live, not anything innate, we have to conclude that what we are describing here are effects of environment, not genes.
Genes have little effects in people's behavior as they migrate to colder regions.
mnli hypothesis: Genes have little effects in people's behavior as they migrate to colder regions. premise: Since all these are changes in how we live, not anything innate, we have to conclude that what we are describing here are effects of environment, not genes.