The "Post-19th Century" period refers to the time after the 1800s, marked by significant changes in society, technology, and culture. This era saw the rise of industrialization, which transformed economies and led to urbanization as people moved to cities for work. Innovations like the telephone and electricity revolutionized communication and daily life. Additionally, the Post-19th Century was characterized by major social movements, including women's suffrage and civil rights, which aimed to achieve equality and justice. The world also experienced two World Wars, which reshaped political boundaries and global relations, leading to the formation of international organizations like the United Nations.