It started as simply a world made of grass and stone blocks, then other blocks were added. Infinite worlds were added, then mobs that wouldn't attack. Soon the mobs were able to attack, more were added, and other things like water, lava, trees, and worlds besides superflat. Ores were added, along with better crafting, and tons of features like maps, compasses, redstone, boats, and so on. Sprinting and sneaking was added, along with bows and arrows. One year, for a Halloween update, the Nether was added, along with the traditional mobs surrounding it. Eventually, through tons of numerous updates, it can to what it is now.
