and politics can build up trust and understanding, awareness and knowledge, and can encourage solving the current challenges or can try to eliminate or reduce difficulties in this context and to promote solutions and improvements. • Challenges related to diversity and lifespan are: 1. To build up better awareness-raising about diversity over the lifespan. 2. To pursue and integrate greater knowledge and reflection about diversity over the lifespan, to promote and support prevention & mental health promotion, and to avoid stigmatization [3]. 3. To involve more national and international agencies, institutions, organizations and associations, for example with petitions, statements, programs and applications. 4. Clear outcomes and action points for challenges Nos. 1-3 should be documented [45]. • Knowledge and understanding about diversity during the lifespan has to be implemented in education, public education, higher education and training [10].