A system is a set of elements arranged in a specific structure, connected through relationships and interacting with each other in order to attain a specific purpose.
e.g. Poverty, War/Battle, Religion, belief

Read Book: Knowigating

Book: https://drive.google.com/open?id=1qsjWdp0xqQOObYMKOu17EU0YtBe6Esvv

Detailed Model: https://drive.google.com/drive/u/0/folders/1YQl8fdsQJgVwGN4UsDzfF4x54SSCr9ID