for the greater good [closed]

In a sentence: "We arrive after a fraught journey, which I undertake begrudgingly, for the greater good, since I am clearly not the maddest person in the bus," what does "for the greater good" mean in connection with the following?

The greater good:

• Is a common expression which refers to the fact that you are doing something that most likely will not benefit you but many people, a community or even the human race according to the context.

• The expression is often used in political, religious or philosophical contexts.

• In your sentence, the author is saying that he undertook the difficult journey for the benefit of all those who made the trip.