Roger and Long were both in Luffy, but Roger couldn't lead everyone out to sea. Roger lured everyone to chase their dreams in the form of treasures, forming a colorful pirate world now. Luffy also impressed Roger and chose to be a pirate. Roger's greatest dream before his death was to make the world free and abolish slavery with his own efforts, but Roger didn't realize that he didn't have this ability until the end. Because it is not easy to realize a free country.
Roger and dragon can't do it; Every time you go abroad, you should give these people courage and weapons, so that when people encounter unfair things, they can pick up their sticks and resist. According to the official introduction, wherever the revolutionary army goes, it will release people here.
So their behavior was not only driven out by the navy, but also caused dissatisfaction among other kings. After all, not everyone wants to abolish the monarchy, and there are still many greedy people. This is also the significance of the existence of the revolutionary army. They all just want to resolve this unequal system and let people live a better life without worrying about three meals a day, but so far the revolutionary soldiers have not succeeded.
Luffy can't even fight a four emperors, let alone the people behind him. Only by killing these rulers can he be qualified to build a harmonious society. But it's not easy. Imm, a five-year-old star, an admiral and even a robot newly developed by Bergabonk have all died several times. It is basically unrealistic for Luffy to want to create such an ideal world. Unless ODA deliberately arranged, it is impossible.