Hierarchy
![Hierarchy - people on a](/Images/godic/202501/18/Hierarchy_-_people_on_a_ladder.svg1125.png")
![Maslow's hierarchy of human needs. This is an example of a hierarchy visualized with a triangle diagram.](/Images/godic/202501/18/Maslow's_hierarchy_of_needs1125.png")
![Matryoshka dolls, also known as nesting dolls or Russian dolls. Each doll is encompassed inside another until the smallest one is reached. This is the concept of nesting. When the concept is applied to sets, the resulting ordering is a nested hierarchy.](/Images/godic/202501/18/Russian-Matroshka_no_bg1125.jpg")
![A simple organizational hierarchy depicted in the form of a tree. Diagrams like this are called organizational charts.](/Images/godic/202501/18/Organizational_chart.svg1126.png")
A hierarchy (from the Greek ἱεραρχία hierarchia, "rule of a high priest", from ἱεράρχης hierarkhes, "leader of sacred rites") is an arrangement of items (objects, names, values, categories, etc.) in which the items are represented as being "above," "below," or "at the same level as" one another.