friend, I know that what you're reading is to you compelling, but if there is such a secret organization bent on taking over the world, then why hasn't it being dismantled already by the world's intelligence agencies, if they've actually existed as a global entity?
Think about it, every world leader desires to stay in power for noble and/or selfish reasons. And to keep their power, they not only have the militaries and law enforcement but also their intelligence agencies. If there is a secret group wishing to topple governments they would soon know those behind it.
You believe that the Rothschilds are behind many of the evils of this world as they instigated wars, caused famine, disease, and bought off civil servants. Aside from the civil servants, all of the calamities they've caused cost the government money, time, and manpower to care for it's citizens.
And back to politicians, every politician have rivals; if the Rothschilds bought them, their opposition would soon know the financiers aiding their opponents.
Now let's say that they owned several major international banks, thus have a powerful means of leverage. If they wanted one government to affect Socialist change, then other governments, opposed to, would act against banks to reduce its influence. Even if Socialism becomes popular throughout the world, banks owned by the Rothschilds could only do so much if they want to dominate the world. It is one thing to spread a political ideology, it is another to personally control governments.
To do that involve thousands, if not millions of people, which will surely be discovered. The bigger they are, as a group, the greater chance of discovery through human error in a form of paper trails, loose lips, and careless tradecraft (not to mention, whistle blowers in their midst). Money has to be spent on recruitment, training, and deployment of cell groups in each country. They do not have the time, money, or the energy to waste by poisoning wells for that would involve even more people. And how will they find willing recruits w/out giving themselves away?
And suppose they do, that accomplishes nothing but only increases the chance of discovery by proactive law enforcement agencies.
The only way schemes on a global scale could work is that all involved are super-humans who could perfectly coordinate with each other, not make mistakes, and keep secrets. They would also have to recruit other super-humans with the same ability.