Teaching English as a Second language and social sciences

[Soulife96]

I'll be a lower secondary school (teaching 7 to 14 year olds) teacher in English as a second language, and social sciences. In the past half a year to a year, I've had a dilemma, or an inner debate:

Are interculturality, democratic values, egalitarianism etc, (aka. Stage Green values), something that is learned due to development or education? Or both? And does the answer to this question say anything about how these values should be taught to 7-14 year olds?  There's no doubt that these values should be taught, but how should they be taught if it's more of a developmental challenge rather than an educational focused challenge?

If any teachers here can shed some light on this with their own experience, I'd highly appreciate it