What are characteristics of the 20th century?

The 20th century was marked by rapid technological advancement, including the rise of computers, the internet, and significant developments in transportation and medicine. It experienced major social and political upheavals, including two World Wars, the Cold War, and movements for civil rights and decolonization. Additionally, cultural shifts occurred, with the emergence of new artistic movements and changes in social norms. Environmental awareness also grew towards the century's end, highlighting the impact of industrialization on the planet.