Complex sentence: Marriages within the nobility were political contracts made to balance power within the different families, and this proposal caused political conflicts at court, were the monarch was forced to balance between the two noble families Brahe and Oxenstierna.
Split into simpler sentences: Marriages within the nobility were political contracts made to balance power within the different families. This proposal caused political conflicts at court, in which the monarch was forced to balance between the two noble families Brahe and Oxenstierna.