This includes water for drinking, personal sanitation, washing of clothes, food preparation, and personal and household hygiene (see Chapters 1 and 4). These challenges are not limited to SDG 6, as the cross-cutting nature of water and sanitation affects the implementation of most other SDGs. The transversal role of water across all segments of societies contributes to the complexity of ensuring respect for the related human rights for all, leaving no one behind. This includes indigenous peoples, ethnic minorities, refugees (see Chapter 8) and migrants. Women also often are disadvantaged in terms of their enjoyment of human rights across several societies worldwide. Key barriers and mechanisms of exclusion (Figure 3.1), which have come into existence either intentionally or unintentionally, deprive certain groups of people from the possibility to realize their full potential (UNDP, 2016).