None of this is really surprising, nor anything we would expect to be unique to one culture -- therefore they can all come about independently and when you think about what a society needs to do to survive it's no surprise that they did.

Housing: need places to live safely, need a place live securely, need strong and easy to find materials. Rocks are abundant and hard. Pyramids are the easiest shape to build tall things. Start with a big foundation and build on top of it, and add less as you go up so there's less and less weight to support. Look actually here at the earlier pyramids in Egypt for great examples of what didn't work, they didn't start with the Great Pyramid, there was a lot of trial and error.

Food: You need food and materials to provide for a civilisation, the jump to agriculture is an early one for civilisation and not that surprising. Finding out how to ensure a regularly and steady food supply rather than just relying on nature to provide it. It also means you can stay in one place instead of constantly moving around throughout the year, and therefore be close to your protective dwellings at all times (even more reason to have one then too).

Societal factors: Religion comes as a result of the unknown, so we can't both expect that things would be unknown, and that religion appeared. It's a universal experience across civilisations. "Why is this happening? Why does the sun move each day? Why does thunder exist? What the hell is causing this flooding and why is it happening to us?"

Social Structures also exist in animals. Humans didn't invent the concept of leaders, and leaders will form naturally if a gap is present. You could take 10 fry-cooks from Maccas and drop them on an island, if they're going to survive someone is going to try to take charge (whether efficient or not). But if someone is efficient, and even good, people will be more likely to continue following them. And there comes in warfare. What if someone doesn't like that group, what if rival factions split up, what if a new party shows up and decides that they already have a leader and won't respect the way of things done on the island -- or have arrived with supplies that would be greatly useful? etc.

With war comes loot, you can destroy everything they have, or you can take it and benefit off of that. That includes humans. Humans can farm, humans can build, humans can even teach. We have use. So it's no surprise slavery is common.

Want a stronger system? Create markets, create a central place where you can sell your goods, and people can get them. It benefits everyone.

And then bridges, boats, irrigation, is just a natural extension. River in the way, but there's some good hunting grounds just beyond it? Well, we gotta get over that river. Back to our island buddies, fish may be the best supply they have, need to get in the water to get them? Or maybe to another nearby island? Boats. It's overcoming obstacles, ones that would have been obvious to the people. It's very much "if there's a will, there's a way" we recognise we need to get past this natural wall, how do we do it? Well...