A societal order based on land ownership developed that was known as

Feudalism

Explanation:

The system defining hierarchical system based on land ownership, protection & mutual obligation : is called as Feudalism.

It emerged in ancient history of Europe.

It consists of nobility class (land owners), known as 'lords'. They  recompense knights, vessels  & serfs - by granting them piece of land (called fiefdoms) return of which the latter fight for the former.

imagine me knowing the answer

well it depends i think people around the world are coming around to gay marriage. but if you are talking abortion then wow, so much to talk about. such as men thinking they have the right to choose if women can, the fact there are health concerns if the women can't get one, and many more arguments to discuss. so i would definitely say abortion would be a much more interesting topic.