A tribe?
joined together politically, for a common purpose, or by common feelings.
Confederation
Confederation
People working together for a common purpose or benefit
A clique
To encourage people to live together peacefully
The word "families" is a noun. It refers to a group of related individuals living together, sharing common characteristics and ancestry.
Because it is a time when families come together and more alcohol is consumed.
The common goal of the liberation of India from the British Imperialism.
systems approach
organ system
Because they stick together and have solidary and a common purpose (feeding, social structuring, mating). Once that purpose is complete, they become more solitary.