There are several models available for describing our basic needs; a good compilation can be found here. These models range from lists of 3 to many, any needs. I have found Tony Robbin’s model interesting since it captures opposing needs- something that seems fundamental in setting up the dynamics of trying to balance our needs overall.

The diagram below shows the three pairs of opposing needs as being located on opposite sides of a wheel:

 

Needs can be considered as a primary cause requiring actions to be taken. Our assessment of how good a job we are doing meeting needs often leads to belief formation.

Reference

[1] http://changingminds.org/explanations/needs/needs.htm