Articolo 3 Observatory on discrimination is an association born in Mantua in 2008 to give weight to Primo Levi’s warning found in the introduction of his memoir If This Is a Man: «Many persons or people may, willingly or otherwise, think “every stranger is the enemy”. Mostly this conviction is to be found deep down in people’s hearts, not unlike a latent infection. […] The history of destruction camps should be considered by all as a morbid danger warning».