We've all seen part of this quote many times, but today I finally got to read some of the surrounding context:

"Progress, far from consisting in change, depends on retentiveness.... [W]hen experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it.... This is the condition of children and barbarians, in whom instinct has learned nothing from experience."

-- George Santayana (1905)

I won't bore all you San Franciscans with the full list of Oakland and East Bay measures (two of each), but Oakland's measure Z bears mentioning.

"Title: Cannabis Regulation - An Ordinance that Would Require that the City (1) Establish a System to License, Tax and Regulate Cannabis (Marijuana) Sales As Soon as Possible under California Law; (2) Create a Committee to Oversee the Ordinance's Implementation and Disbursement of Revenue from Licensing and Taxation of Businesses that Sell Cannabis; (3) Adopt Law Enforcement Policies Related to Cannabis; and (4) Advocate for Changes in Laws to Support Implementation and Goals of the Ordinance."

(thoughts based on my first round of research on various California measures & ballot initiatives, edited for readability but not for content)