The United States.
In a political sense- people who ride bikes will never achieve a significant change in attitudes, infrastructure, subsidies, or even painting stoplight sensors unless more people ride. Regardless of the merits, few people ride and most consider it socially unacceptable (-NYC), juvenile and dangerous. Most bicycle riders are generally seen as Lance, homeless or a kid; think a sidewalk is safe and and not wearing a helmet is certain injury.
While you may disagree: geographical and regional differences- most people see us like this.
As a philosophical starting point this explains several political elements of riding a bicycle anyplace. We subsidize mass transit and invest in roads. We build million-dollar-a-mile roads instead of million-dollar-10-mile MUD's. Bike lane markings are slick (rain) crawl up curbs and disappear before intersections. Californians debate a $5 a bike recycling tax as Los Angeles beats Fresno in the smog Olympics. The pattern or premise is always based on the stereotype and homeless people/kids don't vote or pay taxes.
While I'm light on answers, I have seen historical parallels in political movements.
Libertarians are the bicycle advocates of political parties.
"As in any political party, there is some internal disagreement about the platform, and not all the party's supporters advocate its complete or immediate implementation, but most think that the USA would benefit from most of the Libertarian Party's proposed changes.However, under a policy known as the Dallas Accord, the national Libertarian Party does not favor any particular Libertarian approach, leaving this to be decided by the actual locality or users."
Translation: Nobody knows squat about us, and we have several approaches to this end. We splinter along so many lines that we are left with no discernible identity, and no real public impact. (Thats them not us...)
After reading the same VC/bike lane/stickies/road rage stuff I skim and leave. Didn't somebody start a scuba diving comparison thread: that was the last meaningful read.
The most direct personal bicyle advocacy is to ride to work, errands, school, and tell people. If a majority of people did this nationally I wouldn't be carless and some other schmuck would be bikeless, ranting about Vehicle Code/car lane/stickies/bike rage.