Devotion to the creation of a unified independent state based on a common culture and language is known as

Devotion to the creation of a unified independent state based on a common culture and language is known as nationalism.
Nationalism is characterized with a  a sense of national consciousness exalting one nation and attachment to the native soil, to the traditions of their parents and to the born country. 

provide businesses and individuals with insights into business and career opportunities for the future.

Explanation: Demography can be defined as the study of human populations and how they change. The size, characteristics and density are examples of the studies conducted. Here, demography studies can be important in giving information about businesses and insights to business by predicting which markets are growing and which markets are declining.