---
title: a small group is big enough
canonical_url: https://ensurance.app/guide/a-small-group-is-big-enough
markdown_url: https://ensurance.app/guide/a-small-group-is-big-enough.md
subtitle: "a crew, a club, a family — one namespace, as many accounts as it has mandates"
category: ensurance
---

# a small group is big enough

*a crew, a club, a family — one namespace, as many accounts as it has mandates*

Say five neighbors want to keep a creek. Starting a community group comes down to four plain decisions, and most groups make them before they ever talk to a lawyer:

1. **Name what you keep.** One sentence: the creek, the park, the orchard, the cause.
2. **Say who is in.** A list of names, and how someone joins or leaves.
3. **Decide how you decide.** Majority, consent, or one coordinator with a check-in. Write it down.
4. **Choose where the money sits.** A member's bank account for small sums, a fiscal sponsor or a registered nonprofit when grants arrive, or an account of the group's own. (Rules on handling other people's money differ by place; check yours first.)

That is enough to begin. Five neighbors who agree on those four things are a group. The rest — a name, a logo, a meeting schedule — can come later.

Take a typical case, a made-up one. A creek runs behind a row of houses, choked with trash after every storm, its banks losing the alders that shade it. The creek, the alders, and the trout that need the shade already depend on one another, whether or not anyone forms a group. [**Ensurance**](/?from=guide) is how the thing a group names gets funded to keep working. It is not the creek, and it is not the group.

## the four steps, a little deeper

**Name what you keep.** Be specific about the living thing and its size. "Clean up the neighborhood" is a mood. "The half mile of Willow Creek between the footbridge and the culvert" is a job. The size you name is the size you can act on, and it can grow later.

**Say who is in.** Keep a list, even a short one. Decide whether a new member needs an invitation or just shows up. Groups that skip this step tend to argue later about who got to decide.

**Decide how you decide.** Small groups often run on consent: a proposal passes unless someone has a serious objection. Larger ones vote. Either works if everyone knows the rule before the first hard decision, not after.

**Choose where the money sits.** For a few hundred dollars of supplies, one trusted member's account and a shared spreadsheet are fine. When money grows, look at a fiscal sponsor, an existing nonprofit that holds funds for groups like yours. Registering your own nonprofit is a bigger step and can wait.

There is good evidence behind the second and third steps. Elinor Ostrom studied commons that lasted for generations — irrigation systems, fisheries, forests — and found that the long-lived ones had clear boundaries around who was in, and rules the members themselves could make and change (*Governing the Commons*, 1990). A small group that writes down who is in and how it decides has done two of the things she saw working.

:::johnson
**a small group can keep a whole creek.**

Five people with a list, a rule, and a place for the money can look after a half mile of water. The group does not have to be big; the job has to be named.

[see the creek in its watershed →](/explore?from=guide)
:::

## a group as a namespace

In ensurance, a group is a **namespace**: a name, such as `.tgn` or `.boulder`, with accounts under it. A namespace can hold as many accounts as it has things to keep. Some are people, some are places, some are purposes. A creek crew might hold one account for the crew, one for the reach of creek, and one for the purpose it serves, such as cold water for trout.

The namespace is not a legal entity and it does not replace your fiscal sponsor, your nonprofit, or your rules. It is an address. The group stays accountable through whatever structure it already has, and a person confirms every action an account takes.

How a group is created, what it costs, and how accounts are opened inside it is covered in [run a group for what you already care about](/guide/run-a-group-for-what-you-already-care-about?from=guide) and [how to create an ensurance group](/guide/how-to-create-an-ensurance-group?from=guide). This post does not repeat the mechanics. It shows what the group looks like at different sizes.

## the same group at three sizes

On 26 Oct 2026 the catalog held 25 group namespaces. Three of them show the people leg at different sizes.

| namespace | accounts | what is under it |
|---|---|---|
| [.tgn](/groups/tgn?from=guide) | 114 | 106 people accounts, 3 purpose accounts, 5 untyped; 28 with a wallet deployed. The namespace's own description ties it to mangrove planting. |
| [.boulder](/groups/boulder?from=guide) | 33 | 30 people, two places ([cu.boulder](/cu.boulder?from=guide), [pearl.boulder](/pearl.boulder?from=guide)), and one purpose ([ensurance.boulder](/ensurance.boulder?from=guide)) |
| [.mumbai](/groups/mumbai?from=guide) | 22 | 19 people, one place ([basin.mumbai](/basin.mumbai?from=guide)), and two untyped accounts named for the city's water |

Read the table for what it is. These are namespaces made in the protocol. A city name in a namespace does not mean the city government, a university, or any company there is a member. And no group in the table is shown here as having funded anything; an account is where a payment can land, not proof that one has.

What the three share is the shape. Each is one name holding many accounts, each account has an address, and a person confirms what each one does, unless the group has switched on a program. What changes with size is the decision rule. A crew of five can agree around a tailgate. A group of a hundred needs the written rule from step three, or it stalls.

## smaller than you think

The smallest group is two people. A couple who keep an old orchard, a parent and child who monitor a nest box, two neighbors on either side of the same creek. If they share a thing to keep and a way to decide, they are a group, and the same namespace shape holds for them as for a hundred members.

That is the point of the people leg being fractal. Nothing new gets invented when a group grows from two people to a namespace with a hundred and fourteen accounts. Only the grain changes: more names on the list, a firmer rule for deciding, and more accounts as the group names more things it keeps.

A namespace with one honest account is a finished first step. Do not open accounts for things the group does not actually keep. Each account should match something real: a reach the crew walks, a purpose the members already work toward.

## when the group meets other groups

A creek crew is rarely alone. A watershed council covers the river the creek drains to. A land trust holds the parcel upstream. A town runs the culvert. Your group's account sits beside theirs; it does not speak for them, and they do not have to join anything for your group to exist.

That is people→people. Your crew depends on the town's storm drains and the council's water tests. The council depends on crews like yours to walk the banks it cannot reach. Naming those links does not change who decides what. It makes clear who keeps which part.

The next post goes up a size, to the group with a balance sheet: [every company depends on places it does not own](/guide/every-company-depends-on-places-it-does-not-own?from=guide).

If your group already keeps something and you want to think through which accounts are real and which are noise, [write to us](/contact?from=guide&topic=ppp-people).

## frequently asked questions

### how do you start a community group?

Make four decisions: what you keep, who is in, how you decide, and where the money sits. Write each one down in a sentence or two. Five people who agree on those four things are a group.

### does a community group need to register as a nonprofit?

Not to start. Many groups begin with a member's bank account for small sums and move to a fiscal sponsor or their own nonprofit when grants or larger gifts arrive. Rules differ by country and state, so check locally before you take donations.

### what is a group namespace in ensurance?

A name with accounts under it. It can hold people, place, and purpose accounts, as many as the group has things to keep. It is not a legal entity and does not replace the structure the group already uses.

## sources

Elinor Ostrom, *Governing the Commons: The Evolution of Institutions for Collective Action*, Cambridge University Press, 1990 — long-enduring commons have clearly defined boundaries and rules that members can take part in making and changing

## the series

Six posts on one leg of the triad: people, from one person to a whole town.

1. [who counts as people?](/guide/who-counts-as-people?from=guide) — read first
2. [one person can hold an account](/guide/one-person-can-hold-an-account?from=guide)
3. **a small group is big enough** — you are here
4. [every company depends on places it does not own](/guide/every-company-depends-on-places-it-does-not-own?from=guide)
5. [a town is people who share a place](/guide/a-town-is-people-who-share-a-place?from=guide)
6. [place, purpose, people at any size](/guide/place-purpose-people-at-any-size?from=guide)

## the three series

Place, purpose, and people, each walked from the smallest size to the largest, after one question.

- [what counts as a place?](/guide/what-counts-as-a-place?from=guide) — the place series
- [what counts as a purpose?](/guide/what-counts-as-a-purpose?from=guide) — the purpose series
- [who counts as people?](/guide/who-counts-as-people?from=guide) — the people series
- [what do you want to ensure?](/guide/what-do-you-want-to-ensure?from=guide) — the question the three series start from