If we see that during a portion of history some people...
If we see that during a portion of history some people prevented their political aspect from being realized, it does not mean that they cannot be implemented. Rather, since these laws were formulated in view of the realities of the existence of man, all human societies are in search of them, and according to the belief of Shi‘as, will in the end reach them.
“Surely We have guided him to the Path, whether he be grateful or ungrateful.” [^2] This is because the responsibility of the prophet is to propagate the Divine laws, among which is Imamah ; it is the people who must accept the prophets’ invitation and cooperate with the prophets and Imams (peace be upon them) to make available the opportunity to put it in practice.
The conduct of the Imams (peace be upon them) and their policies were all practical, bearing results, and at the same time realistic. For example, the conduct of Amir al-Mu’minin (peace be upon them) was in light of the conditions of existing realities and the conduct of Imam Hasan al-Mujtaba (peace be upon him) and Imam Husayn Sayyid al-Shuhada’ (peace be upon him) was the same way. They performed all their actions while keeping in view existing conditions.
For example, if Imam Hasan al-Mujtaba (peace be upon him) made peace with Mu`awiyah, he took into consideration all the aspects of the issue and in those conditions saw no better course of action. And Imam Husayn (peace be upon him) consciously refused to pledge allegiance to Yazid, went to Karbala’ and accepted those sorrowful difficulties, and in the end reached his purpose.
Yes, if Imam Husayn (peace be upon him) had been in a different situation and had seen that the path and provisions for taking charge of the government are ready, he would still have moved to acquire his right and repel the undeserving from the khilafah of the Prophet (peace be upon him and his family). But conditions in his time were such that he knew that the situation is not suitable for reaching this aim.