Fathwa, - Certain women's rights and responsibilities in Islam

Question
1(Why in Islam girls cannot go out alone , but here in Europe is it
possible to go out alone ?
2(What is the problem when girl has a boyfriend, before they get married?
3(What are the problems bad effects of freedom of Europe on and
American women )Like sex,bad clothes, etc.(
4( Men in Islam can have many wives, why can't women have many husbands?
Please I want full answers .
5(How can I invite non-Muslim people to be Muslims?
Answer
Praise be to Allah, the Lord of the Worlds; and may His blessings and
peace be upon our Prophet Muhammad and upon all his Family and
Companions.
It is unlawful for the woman to travel alone without a Mahram )a
non-marriageable man )brother, father, uncle etc.(. This prohibition
is due to the fact that a woman traveling without Mahram can encounter
a lot of difficulties, including being raped or tempted to commit
Haram acts.
It is lawful for the woman to leave her house for some need provided
she is certain that she will not be tempted or her going out will not
cause her some misfortune.
So, she can go alone to schools, hospitals or to any other place if
there is a legal purpose for going there and provided she respects all
the Shari'a conditions related to this.
For the Fatwa about boyfriends and fiancé, please read 81356.
There are many bad consequences that result from libertinism of women.
These include sexual anarchy, mixing up progenity, spreading sexually
transmitted diseases, etc.
We do not call this freedom, it is rather worshipping Satan and being
inclined to his whispers. It also makes real the bad ideas of the
ill-informed people who take every opportunity to influence women by
beautifying to them to perform bad acts and calling that freedom.
Allah knows best.