Hope is the ultimate human strength and the opposite of fear. In these uncertain times, it is important that we thoroughly understand hope as a source of success, resilience and happiness. In The World Book of Hope, 100 top scientists share their expertise in this domain. International research has shown that 90% of the world population has a hopeful view of the future. Hope is universal, regardless of age, gender or income. The well-known psychiatrist Viktor Frankl, a survivor of the Holocaust, wrote that the last freedom that can be taken away from a person is the manner in which he or she looks at circumstances. That is the core of hope. Real hope doesn't create false expectations but is a source of positive emotions. It allows us to see new possibilities and makes passive people active again. Hope has a healthy influence on our mental health. Hope stimulates change. First chapter written by Nobel Prize Winner Kofi Annan and epilogue by the world's most famous and prestigious philosopher Martha Nussbaum 'Hope matters. Hope is a choice. Hope can be learned. Hope is contagious.' Dr. Shane J. Lopez, USA