See TEUart 3(1) 'The Union's aim is to promote peace, its values and the well-being of its peoples.' (3) '... and shall promote social justice and protection...'
See TEU arts 3(3) 'It shall work for the sustainable development of Europe based on balanced economic growth and price stability, a highly competitive social market economy, aiming at full employment and social progress, and a high level of protection and improvement of the quality of the environment'. Art 4(3) 'Pursuant to the principle of sincere cooperation, the Union and the Member States shall, in full mutual respect, assist each other in carrying out tasks which flow from the Treaties'.