economic integration and social cohesion the european union s experience vasco cal mexico november 2004 structure of this presentation origins eu policy value added main challenges within enlarged proposals for 2007 2013 in order to promote its overall harmonious development community shall develop pursue actions leading strengthening particular aim at reducing disparities between levels various regions backwardness least favoured or islands including rural areas article 158 treaty adopted 1986 after enlargement portugal spain became one three pillars alongside monetary single market a political decision 1 very idea implies notion solidarity sense common concern well being all countries ultimately individuals originally under eec was be achieved by forces an increasingly integrated economy gradual convergence per capita