Interaction: Members of a society must come in contact with one another. If a group of people within a country has no regular contact with another group, those groups cannot be considered part of the same society. Geographic distance and language barriers can separate societies within a country.
Example: Although Islam was practiced in both parts of the country, the residents of East Pakistan spoke Bengali, while the residents of West Pakistan spoke Urdu. Geographic distance, language differences, and other factors proved insurmountable. In 1971, the nation split into two countries, with West Pakistan assuming the name Pakistan and East Pakistan becoming Bangladesh. Within each newly formed society, people had a common culture, history, and language, and distance was no longer a factor.