Every country has a constitution, many newer countries have adapted old constitutions, like the French and the Greek, and fashioned it to there cultural principles.Some have a Preamble like USA and France even though France Preamble is not so eloquent as of USA. Then comes the Articles which is the meat and potatoes the Supreme Law of the land, as they state.

I submit that humanism if its to evolve to full political choice must do away with Manifesto, which is basically a public declaration of policy and aims not a true Supreme Law of the Land to abide by or follow.

We don't have to make Humanism a way of governess, we can't just let the other ISM keeping evolving and some how possible incorporate some form of Humanism in there by-laws, but I think this is wishful thinking. If above all humans must strive to be Humanistic in nature then why no make it a foundation of government.

Here is a example of a Possible Preamble

*Preamble

We humanity of the planet earth shall be an indivisible, secular, democratic and social SOVEREIGNTY of the entire earth. By virtue of these principles and that of the self-determination of Humans , in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense for all life forms, promote the general Welfare of all life forms, and secure the Blessings of Liberty to all humans.

Article 1
It shall ensure the equality of all citizens before the law, without distinction of origin, race
or religion. It shall respect all beliefs. It shall be organized on a decentralize basis. Statutes shall promote equal access to all humans to the elective offices and as well as to position of professional and social responsibility. We regard the universe as self-existing and not created and does not deny the possibility of realities as yet undiscovered, but it does insist that the way to determine the existence and value of any and all realities is by means of intelligent inquiry and by the assessment of their relations to human needs. Religion must formulate its hopes and plans in the light of the scientific spirit and method.

You get the idea in this framework humanist that have a law degree can start to ratify a working version that does not have to be on perfect masterpiece, but can be a framework to build from a viable humanistic answer to the current ISM that are not going any where.

Yes kinda like in Star Trek the creation of the Federation.

The amount of talent in the Society we should be able to create a framework in no time, tapping to all the disciplines we have, I am sure we can come up with a rock solid approach, and yes like all of the past we most likely be tapping into the current articles and constitutions that exists to create a Humanistic one.

Just put the network to the task be done in no time, at a minimum will be left for posterity for some future human to use as a Guide when all goes to sh***t.

They did this on Star Trek when they formed the Federation...

Excellent assessment "full political choice" till present time, nothing has come close to a having another choice to evolution of Political ideology. Everything needs to evolve to a better system, maybe even using version control. There is currently no version control for Capitalism, Socialism or even communism,, how do we debug the current systems, there is not Capitalism 2.0 or Socialism 2.0.

Just like the manifesto is up to version 3, the new Humanism political Ideal should in Versions. After all none of these philosophical ideals Capitalism, Socialism, Communism come in version progression like if what was written the first time is the all encompassing perfection which is absolutely not the cases.

The concept is to take the fourteenth statement of the first manifesto to heart and write the road map to complete viable political choice instead of a empty statement that lacks the substance.

FOURTEENTH: The humanists are firmly convinced that existing acquisitive and profit-motivated society has shown itself to be inadequate and that a radical change in methods, controls, and motives must be instituted. A socialized and cooperative economic order must be established to the end that the equitable distribution of the means of life be possible. The goal of humanism is a free and universal society in which people voluntarily and intelligently cooperate for the common good. Humanists demand a shared life in a shared world.

and also the Tenth of the Second Manifesto

TENTH: Humane societies should evaluate economic systems not by rhetoric or ideology, but by whether or not they increase economic well-being for all individuals and groups, minimize poverty and hardship, increase the sum of human satisfaction, and enhance the quality of life. Hence the door is open to alternative economic systems. We need to democratize the economy and judge it by its responsiveness to human needs, testing results in terms of the common good.

The mechanism for a shared world and a evaluated economic system is lacking. If we start to explain such a new way of doing business, this is what will bring down the house of cards of Capitalism and Socialism. The road most likely will be in varied steps in an incline, each step harder to achieve the goal but it is the only way to reach the top of the mountain, there no elevator for this economic radical change, but it is a must.

The last Manifesto version 3 is really lacking the substance for the year 2020 an beyond, Is really lacking suggestions for the future, a suggestion is to start a Thread Called Manifesto Verion 3.1 and lets start getting to the substances, the meat and potatoes of the philosophy.

United States is pure capitalism. That doesn't mean the government doesn't provide services for it's citizens.