One of the most powerful leaders of the 20th century, Adolf Hitler was a German dicator whose policies started the WWII that resulted in the death of millions of people. He had a visceral hatred for Jews and during his regime nearly six million Jews were killed in Holocaust.

Cinema lovers around the world hold Charlie Chaplin in high esteem. One of the biggest stars of the silent film era and an icon, he left the audience in splits with his comedic performances. Even today, his performances in movies like Modern Times and The Gold Rush are considered classic. The legendary actor was also a writer, director and producer.

Austrian-British philosopher Ludwig Wittgenstein is remembered for his works related to logic, the philosophy of mind, the philosophy of mathematics, and the philosophy of language. He taught at the University of Cambridge for many years. He published only one book during his lifetime. Most of his manuscripts were collected later and published posthumously.

While the Hubble Telescope, named after Edwin Powell Hubble, reminds one of his contribution to astronomy, he failed to get a Nobel Prize, as back in his time, the Nobel Committee didn’t recognize astrophysics as a valid science. He is best remembered for his work on galaxies and extragalactic astronomy.

Jawaharlal Nehru was one of the central figures of the Indian independence movement along with personalities like Mahatma Gandhi. He became the first prime minister of India and left behind such a legacy that his direct descendants continue to play an important role in Indian politics.

British-American actor, Claude Rains, had an extensive career that spanned nearly seven decades. The son of a stage actor, he was introduced to the entertainment industry at a young age and went on to have a successful career. He was nominated for the Academy Award four times. He is considered one of the finest actors of the 20th century.

Igor Sikorsky was a Russian-American aviator known for his pioneering contributions to the development of both helicopters and fixed-wing aircraft. Born in Russia, he immigrated to US as a young man and founded the Sikorsky Aircraft Corporation in 1923. He is also credited for developing the first of Pan American Airways' ocean-crossing flying boats. 

Vaslav Nijinsky was a ballet dancer and choreographer. He is counted among the greatest male dancers of the early 20th century. He was known for the intensity of his characterizations. He was brilliant and could dance en pointe, a rare skill few male dancers of his era possessed. He suffered from mental health issues in his later life. 

Nobel Prize-winning Chilean poet and educator Lucila Godoy Alcayaga was better known by her pseudonym, Gabriela Mistral. The suicide of her first love inspired her poem Dolor. Her diplomatic assignments later took her to places such as Madrid and Lisbon. She is remembered for her emotional verses and her feminism.

Claude McKay was a poet who played an influential role in the Harlem Renaissance. Remembered for his work If We Must Die, a poem written in response to mob attacks on African-American communities by white Americans, McKay was named the national poet of Jamaica in 1977. For his contribution to literature, he was posthumously honored with the Order of Jamaica.

One of the greatest Russian women poets, Anna Akhmatova had started writing poems at age 11. She was part of the Acmeists, who laid down their own style, Acmeism. Poema bez geroya and Requiem remain two of her finest works. She later wrote about the horrors of the Stalinist regime.

Thomas Midgley Jr. was an American chemical and mechanical engineer. Midgley played a key role in the development of leaded gasoline and chlorofluorocarbons (CFCs), which were later banned due to their negative impact on the environment and human health. Thomas Midgley Jr. was granted over 100 patents during his lifetime.

Taha Hussein was an Egyptian writer, intellectual, and one of the most influential personalities in 20th-century Egypt. Best remembered for his literary work, Hussein received 21 nominations for the prestigious Nobel Prize in Literature during his lifetime. Taha Hussein is also remembered for his political career; he served as the Minister of Education in Egypt.

Swiss-French artist Sophie Taeuber-Arp initially studied textile design and later began creating multimedia art called Duo-Collages, along with her husband, German-French abstract artist Jean Arp. Apart from teaching at an art and craft school, the Dadaist had also used dance, painting, and sculpture to showcase her artistic talent.

Known as Albert Dussel in Anne Frank’s diary, Fritz Pfeffer was a successful Jewish dentist who had hid along with Anne Frank and her family in the Secret Annex during the Nazi invasion of the Netherlands. Initially deported to Auschwitz-Birkenau, he later died at the Neuengamme concentration camp.

Harry Nyquist was a Swedish electronic engineer and physicist best remembered for his contributions to communication theory. His work earned him many prestigious awards such as the IRE Medal of Honor, the Stuart Ballantine Medal, and the Rufus Oldenburger Medal. Harry Nyquist is also remembered for his association with Bell Telephone Laboratories.

Filmmaker and producer Paul Bern was the man behind the launch of American sex symbol Jean Harlow. He, unfortunately, died of a gunshot wound only 2 months after his marriage to Bern, which gave rise to numerous theories, one of them being suicide. The handwritten suicide not found was not conclusive.

Pitirim Sorokin was a Russian-American political activist and sociologist best remembered for his immense contribution to the social cycle theory. His life and work have played an influential role in the life of popular American historian and scholar, Allan Carlson. Among other prominent personalities who have been influenced by Sorokin's work is American politician and 48th Vice President Michael Pence.