http://www.bahai.org/action/involvement-life-society/
The Teaching of the oneness of humanity. That is the major contribution. It's nothing to do with people joining the Baha'i Faith but about educating all humanity to put humanity and not vested and national interests first.
Unless the world and its leaders and its people embrace all humanity regardless of race, religion and nationality - as equals then we face another war.
Baha'is are daily trying to remove prejudices and at this crucial juncture it is all about the oneness of humanity. Nothing else will help the world.
There is no deed greater than educating people to live in peace in this day and age, to accept all humanity as our family. Is there anything more important?
So what I understand you to be saying is that in this day of war, terrorism and disunity, promoting the oneness of all humanity so that we all accept each other's differences unconditionally as part of one human family is of no importance, no significance and a promoter of the peace and well being of all humanity is not doing anything good for humanity?
That educating blacks and whites to see each other as equal humans is not a deed.
That educating people to be tolerant towards each other's Faith is not a deed.
To promote equality of the sexes and the status of women is not a deed.
To educate our children to love all humanity is not a deed.
To teach youth that to serve others, their community and all humanity is not a deed
To promote peace and goodwill towards all humanity is not a deed
To encourage all people to be free from all forms of prejudice is not a good deed.
To educate people to work together as one family, with our diversity, for the betterment of the human race is not a deed.
To put humanity first above national or other interests is not needed today? For all of us regardless of religion, race or nationality to come together is not needed?
If all these are written off then yes we have done nothing for humanity but this is what we do.
Baha'is want world peace and unity and the happiness and well being of all humanity not for everyone to become Bahai or to dominate the world. That is not what we are about. We are about one main theme, the oneness of all humanity.
And it will not happen except through education as treaties and pacts can easily be broken.
I suppose educating humanity to accept its oneness also doesn't constitute itself as a 'deed' but then how are we going to achieve meaningful peace without our prejudices being eradicated through education???