Often called by 'rationalists' the greatest philosopher of science of the 20th century.
Popper trusts in the continuity of the religion rational science
He was born in 1902 and raised with a great appreciation of music. He entered the University of Vienna early, for a time flirted with Marxism (but this guru of 'rationalism' found dogma other as his own distasteful), in 1928 received a Ph.D. in philosophy, and in 1929 became accredited to teach mathematics and physics. The One: Karl Popper might be seen as a kind of 'office wizard'. He enjoyed 'rational' theory, but probably never visited countries like Vietnam, Indonesia, Morocco, China, Thailand etc.
This son Karl of a professional-scholarly Jewish family in Vienna. In 1900 this family converted to Protestantism. Karl Popper got 'drugged' by the new 'abstract thinking' in Vienna, introduced by the English .
In 1814 after the defeat of Napoleon, this Austrian capital in leading circles started 'daydreaming'.
The last great monarchies in Europe had joined forces against France, resulting in total stagnation.
From then on in Vienna ruled the weird 'rational' belief (coming from Anglican England and Immanuel Kant's homecountry Protestant Prussia) that abstract dreaming had more value than physical work.
This 'revolutionary' illusion caused bureaucracy, as described in this Franz Kafka quote:
Every revolution evaporates and leaves behind only the slime of a new bureaucracy.
And made the same young Kafka (1883-1924) in total amazement write "Die Verwandlung" (the Metamorphosis).
It made Popper decide for a metamorphosis from craftsman to student 'philosophy' (to become wizard in 'rational' fantasizing).
(Such mind-body split arguing in the Israel-Palestine conflict makes Jews believe to have more 'soul' than Muslims).
1928 Ph. D. in philosophy
Popper became a social and political philosopher
After WWII he emigrated to from Austria to New Zealand where he taught at Canterbury University College of Christchurch.
1946-1960 Professor of logic and then of methodology at the London School of Economics
(students amongst others Imre Lakatos and Paul Feyerabend).
Though he made dangerous missteps in logic, and consequently should have stayed far from methodology
His influence can be seen in the mess that Imre Lakatos made of logic (sorry), while imitating Thomas Kuhn.