Social networks will become a fundamental way we communicate with our governments, businesses and loved ones, Twitter co-founder Evan Williams has told the BBC.
He said that Twitter will be expanding into regions where only the simplest of technology is available.
In areas where censorship hinders freedom of speech, he hopes the "open exchange of information will prevail".
There are still no plans to charge end users to use the site.
"Our goal at Twitter is to be a ***** for good," he told the BBC's Carrie Grace on The Interview.
"We have a fundamental belief, having worked on this type of thing for 10 years, that the open exchange of information has a positive impact on the world."
Part of this vision, Mr Williams adds, will require the service to expand into areas where technology is more limited.
"We think it's particularly exciting in regions where they have less access to information.
"Which is why we're pushing to expand SMS coverage in India, and Haiti, and other areas where with the simplest mobile phone you can get updates and information you've never got before."
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"Last we checked, we were blocked in China.
