Simplify the following text for a Grade 6 native English-speaking person.
Original: It marked the shift from one constitutional monarchy , the Bourbon Restoration , to another , the July Monarchy ; the transition of power from the House of Bourbon to its cadet branch , the House of OrlÃ ans ; and the substitution of the principle of popular sovereignty for hereditary right .
Simplified: This change was from the Bourbon Restoration to the July Monarchy . This also marked the change of power from the House of Bourbon to the House of OrlÃ ans .