Barcelona marginal transformation. A new enclosure in the sea

FIRST OF ALL AND BEFORE STARTING THE TOPIC ABOUT BARCELONA TRANSFORMATION,THIS QUESTION WILL COME INTO MIND THAT WHAT ARE THE REASONS FOR A TRANSFORMATION IN A CITY? BY READING THE HISTORY OF PAST URBAN TRANSFORMATIONS IN CITIES,WE CAN NAME SOME OF THESE REASONS AS ; GROWTH OF POPULATION,INDUSTRIALIZATION,MEGA EVENTS,BASIC NEEDS OF SOCIETY AND ... .IN MY IDEA BARCELONA IS A CITY THAT HAS GONE THROUH THESE KINDS OF TRANSFORMATION DURING DIFFERNT PERIODS AND NOW IT HAS REACHED A LEVEL OF EUROPEAN MEGA CITIES WITH LOTS OF POTENTIALS THAT CAN NOT BE DENIED. BARCELONA IS, AND GONIG TO BE ONE OF THE IMPORTANT POLES IN EUROPE IN DIFFERENT ASPECTS SUCH AS ECONOMICAL,INDUSTRY,TRANSPORTATION,TOURISM AND ... SO WHAT IS GONING TO BE THE URBAN FUTURE OF SUCH A CITY IN WHICH, NOWADAYS WE CAN SEE THE VARIETY OF CULTURES,LIVING METHODS AND NEEDS . IN MY OPINION THE NEW GENERATION OF TRANSFORMATION THAT ARE HAPPENING NOW AND GOING TO HAPPEN IN FUTURE,ARE GOING IN A WAY TO RESPOND TO THE SOCIAL NEEDS OF THE SOCIETY AND TO IMPROVE THE QUALITY OF LIFE OF BOTH CITIZENS AND VISITORS AND INCREASE THE PUBLIC REACTIONS AMONG THEM.SO THESE TRANSFORMATIONS DUE TO MAKE A LIVELY AND INTEGRATED CITY. SO WE CAN CALL THE NEW GENERATION OF TRANSFORMATION AS A SOCIAL-URBAN TRANSFORMATION.IN THIS WAY ARCHITECTURE GETTING INTO ACOUNT NOT JUST AS AESTHETIC OR FUNCTIONAL PROBLEM, BUT AS A SOCIAL ISSUE.SO WE; AS ARCHITECTS,SHOULD BE VERY CONSERVATIVE IN THESE KINDS OF TRANSFORMATIONS.IN THE OTHER WORD,WHAT IS GOING TO ANSWER THE SOCIAL NEEDS OF A SOCIETY,SHOULD ARISE FROM ITS OWN SOCIETY AND AS WE ARE GOING TO RESPOND TO THESE ISSUES WITH THE INSTRUMENT OF ARCHITECTURE , WE SHOULD GET THE INSPIRATION FROM WHAT SOCIETY CONSIDER AND USE AS ARCHITECTURE,AND THAT IS THE CITY IN GENERAL.