At the society's request the tsar granted Kropotkin books to finish his glaciation report. Kropotkin was held in the Peter and Paul Fortress.  His brother, who had also radicalized as a follower of Lavrov,  was also arrested and exiled in Siberia, where he committed suicide about a decade later.
The son of Prince Aleksey Petrovich Kropotkin, Peter Kropotkin was educated in the exclusive Corps of Pages in St. Petersburg. For a year he served as an aide to Tsar Alexander II and, from 1862 to 1867, as an army officer in Siberia , where, apart from his military duties, he studied animal life and engaged in geographic exploration.
His political life was bookended by two epochal events – the Paris Commune of 1871 and the Kronstadt revolt in 1921. The former played a pivotal role in him embracing anarchism and the latter, which erupted shortly after his death, confirmed his repeated warnings about Marxism.
Stephen Jay Gould admired Kropotkin's observations, noting that cooperation, if it increases individual survival, is not ruled out by natural selection, and is in fact encouraged. Kropotkin's ideas anticipate the now recognized importance of mutualism (a beneficial relationship between two different species) and altruism (when one member of a ...
Kropotkin didn't limit his studies to animals alone. He cherished his time in peasant villages, with their sense of community and cooperation: in these small Siberian villages, Kropotkin began...
t. e. The Conquest of Bread ( French: La Conquête du Pain; Russian: Хлѣбъ и воля, tr. Khleb i volja, "Bread and Freedom"; Хлеб и воля in contemporary spelling), also known colloquially as The Bread Book, is an 1892 book by the Russian anarchist communist Peter Kropotkin.
1920: Peter Kropotkin’s Last Letter. 1956: Kropotkin on Mutual Aid. Selected Works of the Anarchist Peter Kropotkin, by the Marxists Internet Archive.
His father, Aleksey Petrovich Kropotkin was a prince of the Rurik Dynasty. His father owned large amounts of land and over 1000 serfs .  His mother, Yekaterina Nikolaevna Sulima was the daughter of a Cossack general. 
Peter Kropotkin, (born Dec. 21, 1842, Moscow, Russia—died Feb. 8, 1921, Dmitrov, near Moscow), Russian revolutionary and geographer, foremost theorist of anarchism. The son of a prince, he renounced his aristocratic heritage in 1871.
Kropotkin’s last years were devoted chiefly to writing a history of ethics, one volume of which was completed. He also fostered an anarchist cooperative in the village of Dmitrov, north of Moscow, where he died in 1921.