My background is in mathematics and I have only read War and Peace for leisure, (though it is by far my favorite novel), so, take this with a grain of salt. I absolutely love Pierre. He is one of my all-time favorite characters in literature. I love how human he is. He constantly struggles to find meaning in life in general, in his individual role in life, in balancing ideals with temptations. Although he is wealthy, his wealth never brings him happiness nor satisfaction. He clings to ideals as he finds them, including idolizing Napolean and his goals of the French Revolution (equality, liberty, fraternity)< he clings to the ideas of the Freemasons, (though is then dissolutioned and dissappointed in the hypocrisy of some of its members). He only truly finds happiness in the very end, through his marriage to Natalya and building a family with her. (I noticed a similar theme with the character of Levin in Anna Karanenina, that simple belief in God, honest work, and family life help one achieve happiness.)