Poorer and undeveloped countries should make all efforts to improve their health, education, and trade proportions. In that case, the role that governments play is very important. I utterly agree that rulers of developed countries should take more responsibility for helping the poorer countries.
It is instantly clear that every single person should help other people. On the one hand, the borders between countries are artificial and have changed repeatedly across time. So, people must not be a fanatic person about their religions or the regions that they grew up in. If we change our minds and see things in another way, we will realize that people look like each other without any primacy. Only under certain circumstances will governments know that all humankind sits at the same ship and if they do not care, we will be drowned.
On the other hand, improvements in health, education, and trade create circumstances for other countries to establish long and friendly relationships with each other. Moreover, security will be at a high level in this situation. So, the governments of the richer nations should provide infrastructure to poorer countries, not only for them but also for their own benefit.
Some may argue that helping other poor countries is not important, while rich countries have some economic paltry issues. However, the economy is not something one can simply topple up with.
In conclusion, my opinion is that helping poor countries by rich countries makes our world a better place, and these actions would end the vicious cycle. Actually, selfishness is not fair in most, if not all, cases.