My point is that if we try to resolve future without agreeing why we have problem in the first place we will continue to see solutions which only suit our own view of history.
Yes, if we agree about the past that would be better. The problem is that it is a very big "if". I've seen countless discussions about our history and most of them result in more hate instead of an agreement. If I didn't have such experiences I would take your proposal much more positively.
As the problems politically began in the 1950s I suggest then.
Well, it depends on what is a "problem" for you. Cypriots have been under the British and before under the Ottomans. For you this might not be a problem, but for Greek Cypriots apparently it was. The events of the 50s didn't appear out of the blue. So we can start from the 50s, but we should also keep in mind how we got there.