السلام عليكم ورحمة الله وبركاته

There brothers and sisters,

I was today talking to one of my cooworkers here in usa , then she asked me questions about POLYGAMY, why islam allow polygamy?
why not polygamy for woman to marry more than one man ?

to answer I found myself very ignorant,

Please can you help me,
what should we answer when asked these questions
?

jazakom Allah khairan

majid