Polygamy Introduction

I picked the topic of Polygamy because I do not know much about it, and it doesn't make much logical sense to me that it would ever be acceptable for a man to have more than one wife!  I want to research and discover how this changes people's daily lives, and how it effects them emotionally.  The questions I will ask throughout my research is, Where do the lines of faith and trust in your partner fall?  How are the woman in these situations okay with this?  What desires these men to have more than one wife?