common goal
A common goal is is a single goal to which the
agents’ actions are directed.
[Can illustrate common vs collective goal with current political situation in
which the actions of bitter rivals may have a common goal but no collective goal
(unlike the political allies).]
This is still not enough. To see why, suppose that
the strangers’ actions are no longer coordinated and they are walking
different routes to their gate, but that
each stranger is concerned that
the Marseille flight should leave on time. As each sees it, the only thing she can
do to this end is to walk to the gate. Her actions are therefore directed to the
same goal as the other’s: to ensure the Marseille flight leaves on time.
So there is one goal to which each of their actions are directed; that is, a common
goal. I suspect we still haven’t captured what talk of a ‘we mode’ aims at.
‘The injections saved her life.’ [distributive vs collective]
Consider the statement, ‘The injections saved her life.’
This could be true in virtue of her receiving several injections on different occasions, each of
which saved her life.
In this case, the injections saving her life is just a matter of each injection individually
saving her life; this is the distributive interpretation.
But the statement is also true if she was given two injections on a single occasion where each
injection was necessary but not sufficient to save her life.
In this case the injections saving her life is not, or not just, a matter of each injection
individually saving her life; this is the collective interpretation.
The difference between distributive and collective interpretations is clearly substantial, for on
the distributive interpretation the statement can only be true if her life has been saved more
than once, whereas the truth of the collective interpretation requires only one life-threatening
situation.
Just as some injections can be collectively life-saving, so some actions can be collectively
directed to a goal.
For example, consider this sentence:
‘The goal of their actions is to find a new home.’
This can be interpreted distributively: each of their actions is separately
directed to finding a new home.
But it can also be interpreted collectively: finding a home is an outcome to which
their actions are directed and this is not, or not just, a matter of each of their actions being
individually directed to finding a home.
To say that an outcome is a _collective goal_ of some actions is just to say that
it is an outcome to which the actions are directed and this is not, or not just, a matter of
each action being individually directed to that outcome.
No mechanisms!
Separate the thing to be explained from the thing which explains it.
Note that collective goals do not plausibly require any kind of intentions or commitments.
After all,
there is a sense in which some of the actions of swarming bees are directed to finding a nest
and this is not, or not just, a matter of each bee’s actions being individually directed to
finding a nest. So finding a nest is a collective goal of the bees’ actions.
Step 2: How could some agents’ actions have a collective goal?
Step 2: how could our actions have a collective goal?