With today's advances in Biology and Technology, can we create a clone of Einstein? If yes why we didn't create one already?

Even a clone with identical DNA gives absolutely no guarantee that the clone will be equally brilliant and provide equally revolutionary insights. You only have to look at a few pairs of identical twins to see this.

this is perhaps not a direct answer to your question, but there's a fascinating article on national geographic regarding current cloning technology as it relates to the de-extinction of species. http://ngm.nationalgeographic.com/2013/04/species-revival/zimmer-text?src=longreads

No we cannot do this at the time and even if we could it would not be a good idea. DNA is very important but it not actually a blueprint. There are also sorts of other effects (called epigenetic) that influence a growing fetus, changing him/her. Einstein had impressive built-in talents. We have no idea how those talents arose from his DNA, even if we have a full copy. (DNA degrades rapidly and we didn't have the methods to take a good sample right then and analyse it.) There is simply no guarantee that an identical-twin Einstein would be as brilliant in just the same ways. He would be smart, we can bet on that. What happened during Einstein's life that helped him achieve such greatness? Would his brilliance have floundered if he hadn't received help with mathematics from the right corner at the right time? Then there are ethical considerations. It is not immediately evident that it would be acceptable to just grow a human being that way, just for an experiment. The discussion on these matters is ongoing and will probably never stop. My question to you.. why would we want to? If we want to improve the world then it would in my opinion be much better to raise the general awareness of science and especially of rational thinking.

My  guess to the first question is that even if humans may not have fully  perfected cloning, we just might somewhere in the near future. My answer  is directed more towards the second questions. Firstly, it is not right to say that Einstein was the most intelligent person to  have ever lived on the planet earth as this question seems to imply.  There are sure to be many more people who are equally if not more  intelligent than Einstein not just in the whole world but also  specifically in the field of science. He just happened be at the right  place at the right time contemplating on a topic that intrigued him at  the time. Moreover, even if he is cloned, he certainly cannot rediscover  relativity and may not even end up doing Physics, which would certainly  not be what the people who create him would want. Secondly and more  importantly, it would be a severe human rights violation. Even with the  cloning process Einstein cannot be brought into the world directly as an  adult. He would still need to be raised in a surrogate womb and brought  up as a child. Without the presence of the loving care and affection of  his biological parents, we would be essentially depriving a young,  helpless infant of a normal childhood which were the conditions under  which he was brought up in the first place. Very soon people would start  justifying the process of bringing to life whoever and whenever they  please. The consequence would be a severe imbalance of the natural and  extremely slow but stable process of evolution. Entire  individual-producing industries will be spawned, which will skew the  natural variation among the human species. Humans would become just like  any other commodity. Our efforts would be better spent actually trying  to motivate and attract other existing bright minds in our society,  thousands of which remain untapped as of now towards science. Besides,  we may end up creating Frankenstein instead of Einstein.

Current cloning technology uses nuclei from living cells, placed into a living egg cell. Einsteins brain is pickled, so to speak, at best. Even with living cells, the success rate is low, and the risk of severe defects is high. Not acceptable with a human, we are not creating slaves here. This is part of why human cloning is not legal atm. To isolate dna from apreserved specimen would be another step, and far from trivial.    Assuming all ethical and technological hurdles are surpassed (not a very reasonable assumption), the other answerers are correct that there is no reason to expect a result anything like the original. Many factors affect intellect, and many more impact choices. As i said, you are not creating a slave