CAPS was the former Californian branch of the Zero Population Growth (ZPG) organization.

[2] Its aim is to help advance state policies and programs designed to stabilize the population at a level which they feel "will preserve a good quality of life for all Californians".

[3] It asserts that the current growth of population is "unsustainable" and contributes to a growing strain on the environment and infrastructure.

In 1993, CAPS filed a lawsuit against Hewlett Packard alleging that HP was violating California labor laws and paid residents of India who came to the U.S. below-market wages as contract programmers.

[6] CAPS has been described by the Southern Poverty Law Center as an "anti-immigrant hate group".