Christians made translated Bibles available to people back then and today as well.
Bible's were not made readily available until the first effective printing presses came along which happened somewhere around the late 14th - mid 15th century in europe. For people to own books back then was very rare, and literacy even more so. For a long time the only book they had access to was the bible. So there's no denying that the bible played a big role in that, not because of some rare property of the bible itself, but simply because it was pretty much the only book available back then.
But literacy and education turned out to be the downfall of christianity, ironically.
And you did not want to be caught with anything else but christian literature/thinking back in those days.. unless you liked to die a painful death. On a sidenote, christianity has been a pain in europes ass for the longest time, I'm glad to live in a time period where I'm allowed to speak my mind freely about religion and not get persecuted for it.
And because many of those people are illiterate, Christians teach them how to read so that these people can read their Bibles. This has gone on for centuries, thus Christianity has contributed very much to world literacy.
The literacy rate in South India is very high, higher than the rest of the Nation. South India's population is mainly Christian. And their high literacy rate has been attributed to Christianity.
See above.
The US is a developed, industrialized, Western nation with a high literacy rate, and #1 economy in the world. Oh, and the US happens to be very religious too.
Secular nations have a much higher rate of suicide than religious nations.
What was that about cause and effect?
As that report said, america is an exception. America is 8th on the HDI list with a majority of the top ten being very irreligious countries. At the #1 spot you find Norway, one of the most secular countries in the world. So that argument takes you nowhere.
America also have some of the highest murder rates, 6,5/100,000 population compared to Norway that sits at a meager 0,60. That's about a 10-1 difference. Your prison population rate is also the highest in the entire world. Your infant mortality rate is also below all western standards.
If you use that report to state that suicides rates are higher in secular countries, then you also have to accept the religiosity/illiteracy part. Just as much of a lack of cause and effect in both of them. Which way are you going to have it?