In 1666, an apple fell on Newton's head. Our modern view of gravity from this event was bred. T'il Einstein came along and he said "Newton man, you suck. Its obvious that space-time controls gravity you shmuck." But unification wasn't to come from relativity, and so forth, Einstein spent his later years in mental misery. Then in 1968, the world of physics it did change, and through the years a new theory arrived and it was strange. It said the world we live in is comprised of not but string, these tiny bits of energy, these crazy wiggly things. It finally made the sub-atomic forces work with gravity, the quantum world and Einstein became one big family.