Mormonism is a religion based on the teachings of a man named Joseph Smith. In the 20th century, many things happened that affected the way Mormons practiced their religion.
One big change was that the Mormon Church became more involved in politics. They wanted to have more say in government decisions that affected their beliefs, such as laws about marriage and family.
Another change was that Mormonism became more global. The religion's leaders encouraged members to spread their message to other countries and cultures, and to be more accepting of diverse ways of thinking and living.
On the inside, the church also went through some changes. Women were given more opportunities to participate in leadership roles, and the church became more focused on helping people in need and promoting good causes, such as environmental conservation.
Overall, the 20th century was a time of growth and evolution for Mormonism, as the church worked to adapt to changing times and remain a relevant force in people's lives.