His mentor, boyar Boris Morozov, was a shrewd and sensible guardian enlightened to see the needs of his country, and was open to Western ideas. However, Morozov was very unpopular and in May of 1648, the people of Moscow rose against both Boyar Morozov and Tsar Alexis Mikhailovich in the so-called Salt Rebellion. The young Tsar was compelled to dismiss them and exiled his own mentor.
On the eve of Tsar Alexis Mikhailovich's death in 1676, the Muscovite Tsardom spanned almost 2 billion acres.
Alexis' first wife bore him thirteen children in their twenty-one year marriage, but he remarried after his wife died three weeks after her thirteenth childbirth. Alexis' second wife bore him three children, the most famous of these children was the eldest son; future tsar (and later emperor) Peter I.