"The reason is very obvious; the basic implementation (followed by people) of a belief is to believe without logic/reason."
I do not agree with the above statement. I strongly believe that every individual in this world will do his actions for his own happiness. He/She will have an strong desire for worldly people and materialistic goods.
Mankind has lot of logic to believe that there is someone who has extreme or supernatural powers who is controlling everything.
This universe is the finest example. We know that the sun, moon and the planets are placed at some exact distance so that their orbits is properly arranged. If the sun were to say for ex: few miles/kms nearer to earth, would any creatures able to survive? If the moon was nearer to earth, would the sea and gravitational force be right enough for creatures to survive? Who is maintaining all these things at the right distance?
There obviously is some power which is doing so, and I call it supernatural power or God.
The next point you said is in earlier days, people believed that earth was flat etc which was disproved. And when someone said earth was round, people with religious faith opposed it. But what about now? Now, people do know that earth is round, still why do most of us believe that supernatural still exists? Should one theory which disproves earth being flat to round make us all believe that there is no supernatural power controlling us all? First there was a small plane, then came a big plane, then came supersonic, then came rocket, then came space shuttle., yet people believe in god, why? My point here is people keep digging deeper and deeper in science, but that should not make us believe that supernatural power does not exists, should it?
Another interesting point you made is about Darwin's theory which speaks about evolution. This theory is amazing which tells us how life begins. But how many of us know that Darwin's theory is very related to our Dashavatara. As per our mythology, the ten avataras of Lord Vishnu are Matsya, Kurma, Varaha, Narasimha, Vamana, Parashurama, Rama, Krishna, Bouddha, Kalki
(Quoted from http://nharipra.wordpress.com/2008/07/02/evolution-and-dashavathara/) There is an amazing co-incidence between what modern science claims as the path of evolution of species and the 10 avataras of Lord Vishnu!
1. Matsya Avatar - Fish - oceanic creature
2. Kurma Avatar - Tortoise - amphibian
3. Varaha Avatar - Pig - Four legged species
4. Narasimha Avatar - Half lion/half man - Primitive man? Neanderthal man?
5. Vamana Avatar - dwarf - man learns to stand on his feet
6. Parashurama Avatar - axe wielding man - First use of tools, crude weapons
7. Rama Avatar - master archer - one of the best warriors
8. Krishna - master strategist
9. Buddha - renunciation
10. Kalki - destruction of evil - happens when evil has reached its zenith
So science and religion has crossed path here :-)
About Sati and Child marriage -- In earlier days, these were some "practises" that were followed. I know these were terribly wrong. But we all know that hindus were not courageous right from beginning of civilization. Many kings from Arab and Afghan invaded and looted Hindustan so many times, yet we never did anything good to protect ourselves. Probably a great wall of India would have been good, but its not there and we have to accept it. But what I am trying to say is people in India at old times were not courageous and did few things to save their women from being made slaves of powerful people. So they made sati or child marriage. But, these are never prescribed in any of our religious texts. (I am referring to Mahabharata, bhagavadgeeta etc). So this is not a religious belief, but wrong practice that was followed by our ancestors who were coward (this is my personal opinion).
Lets take another example. A child is born from the womb of a mother. In its 5th week, suddenly heart starts beating. Who starts it and why? And one day the heart stops beating. why does it have to stop and not beat forever? Can any doctor or science predict that this person will live exactly for this many days? Can someone say this person will become prime minister as soon as a kid is born? All these things cannot be controlled by any human being or science. So there has to be something more powerful than a man and that's supreme being and we call it god.
My intention to write this is just to say that, I believe that some supernatural power exists and I call it god. Some people do not believe so and its ok for them not to believe. Every individual is different in thinking. Last but not the least, maybe I have deviated from the original topic "Religion and science" here and there. My apologies for that.