People were first able to start living in settled communities when

People were first able to start living in settled communities when agriculture was developed.

Explanation:

The origins of agriculture date back to the Neolithic (10,000 to 3,000 BC). The transition from hunting and gathering to farming gradually brought about revolutionary economic and social changes, the so-called Neolithic revolution. The lifestyle of people changed from nomadic to sedentary, more complex social forms arose, and a rich culture developed. The development of agriculture led to the construction of large urban settlements and large temples, as people started to live in large communities.

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.