Simplify the following text for a Grade 10 native English-speaking person.
Original: Alexey Ivanovich Rykov ( ; â `` 15 March 1938 ) was a Russian Marxist revolutionary and a Soviet politician , most prominent as Premier of the Soviet Union from 1924-1930 .
Simplified: Alexey Ivanovich Rykov ( 25 February 1881 - 15 March 1938 ) was a Russian revolutionary and Premier of the Soviet Union from 1924-30 .