Simplify the following text for a Grade 11 native English-speaking person.
Original: The Reverend Thomas Robert Malthus FRS ( 14 February 1766 â `` 29 December 1834 ) was a British scholar , influential in political economy and demography .
Simplified: Thomas Robert Malthus FRS ( 13 February 1766 â `` 23 December 1834 ) , was a British writer on political economy and population .