structural:summarization
Childhood: 1870–1887

In January 1886, when Lenin was 15, his father died of a brain haemorrhage. Subsequently, his behaviour became erratic and confrontational, and he renounced his belief in God. At the time, Lenin's elder brother Alexander, whom he affectionately knew as Sasha, was studying at Saint Petersburg University. Involved in political agitation against the absolute monarchy of the reactionary Tsar Alexander III, Alexander studied the writings of banned leftists and organised anti-government protests. He joined a revolutionary cell bent on assassinating the Tsar and was selected to construct a bomb. Before the attack could take place, the conspirators were arrested and tried, and Alexander was executed by hanging in May 1887. Despite the emotional trauma of his father's and brother's deaths, Lenin continued studying, graduated from school at the top of his class with a gold medal for exceptional performance, and decided to study law at Kazan University.