Yes. Polygamy was allowed and even common among many Biblical groups in several different time periods, generally in the Old Testament. It was also not allowed and frowned upon by other groups in the same time period. Practicing polygamists in The Bible include Abraham, Solomon, David, and Jacob.
Several religious groups believe in or allow polygamy, including Muslims, some Hindus, and some Christians. Anciently (in Biblical times) Jews commonly practiced polygamy as well.
Once. At a time. Serial polygamy is allowed
Polygamy is not allowed in free democratic countries. Polygamous families are very unstable in countries that allow full civil rights to women.
No polygamy is not allowed
No, it's not. Bigamy is a crime in Japan.
Polygamy never worked in any society. Even in old Biblical times, if you read every story that involved polygamy you will see that every instance of polygamy ALWAYS ended in disaster. Polygamy began with the reprobate line of Cain. It never did work and always brought much heartache and chaos to those who practice it, especially the children involved. It may work for men who only want sex toys but usually even the men end up regretting it.. God allowed polygamy in the OT but He never condoned it. We see in the order of God's creation that God gave man only one woman. Jesus points back to the order creation as God's original intent. In the NT Jesus condemned the practice and so did all of the apostles.
polygamy
In the US, polygamy was never a standard practice. Even Utah wasn't allowed to be a state until they stopped it. In general, polygamy for Christians died out in a couple centuries after Christ. He preached that one man should cleave to one woman, and love became more important in marriage than community ties. Polygamy continues for other groups. It is not compatible with customs of free democratic countries, however and is not allowed anymore.
Polygamy is neither ordered nor forbidden in Islam. It's allowed "up to four wives" under conditions & being fair with all of the wives is one of these conditions.
Polygamy is not legal in Australia.You are only allowed one lawful wife.
Polygamy is being allowed to have multiple marriages at once. Some countries do in fact still support polygamy, it is legal in 58 out of nearly 200 sovereign states. Therefore it is not actually completely illegal and is hard to say when it was made illegal as each country would have done this at different times. I would search it for particular countries rather than generalising it.
Oil lamps were used for light in Biblical times.