Are you saying that a person must reject faith in order to be a good person or to actively make the world a better place?
Can you list 5 atheists who changed the world for the better?
I can name hundreds of theists/deists:
* William Wilberforce
* Abraham Lincoln
* George Washington
* Martin Luther King Jr.
* John F Kennedy
* Francis Collins
* Isaac Newton
* Barack Obama
* Mother Theresa
No I would never say that a person must reject faith to make the word a better place. That's a ridiculous thing to say because it's factually wrong. People of faith have made positive contributions to society. But PEOPLE aren't being scrutinized, their beliefs and religions are. PEOPLE have made positive changes in the world, religion paved the way to the holocaust.
Making the claim you're making here doesn't actually say anything. The world has been dominated by religion all the way up to Darwin, and even after Darwin it still has a grip on society. Of course there have been theists who made the world a better place, but in order to do so what first had to happen was the church had to lose its authority.
While religion actually RULED we, as a species, were unable to advance ethically, morally, or scientifically. Attempts to do so were labeled heresy and resulted in death or imprisonment.
While religion ruled, people lived in huts and mud, died of diseases believed to be caused by scourges and were kept poor while kings and princes lived lives of luxury believed to be ordained by god and supported by the church. Only because of science has any of this changed, diseases were no longer because of God, people had good food and homes and those of lower classes today enjoy better luxuries than kings and princes could ever even dream of under religious rule. Only by man and because of man has society improved and that only because religion lost its control.
i could absolutely name atheists who changed the world, but it doesn't actually mean anything, I won't reduce their accomplishments to some pointless competition. Even if I could not do this, it doesn't change the empirical evidence that religion is the source of the worst things that ever happened in our history and now.
I cannot stress enough the example of stem cell research. Banned because of religious dogma. Because this research exists and could end the suffering of millions of people, the fact that those millions suffer still must be laid at the feet of religion as its fault. This is only one example of the harms of religion affecting society out of numerous others.