Because many believed in God.
Judaism has had minor influence from the languages and cultures of the people among whom Jewish communities have lived. Judaism's main influence, however, was and is the traditions of Abraham and the Torah which God gave us. See also:
http://judaism.answers.com/jewish-history/a-biography-of-abraham
1) The desire of its founders and its prophets to reach perfection in God's service. 2) God, through prophecy and Revelation.
3) God's Torah.
The Torah and the Prophets played a vast role in the development of Hebrew religion (Judaism), because they are Judaism. They define it. Judaism entails living according to them. The Hebrew Bible reiterated the teachings of Abraham (Talmud, Yoma 28b) and codified their exact details; and at Mount Sinai, the Hebrews (the Israelites) accepted as obligatory what had until then been national custom.
The Torah and Prophets have shaped our ways of thinking and provided a national legal code:
Practicing kindness and avoiding dishonesty became obligatory instead of merely proper.
Agriculture in the Holy Land included tithes to be given to the Levites and Kohens, thus providing for a scholarly class of people. One of the tithes was given to the poor, thus obviating the existence of starvation.
Immorality and incest were legislated against in detail. Instead of instinct or "crimes against nature," they were subsumed into religious law.
The roles of king, prophet, Kohen, Levite, officers and judges were all provided for in the Torah, thus defining the shape of the society and its institutions and providing certain balances.
The Israelite year was filled out with the Sabbaths and national festivals; and they were imbued with the function of worshiping God instead of being secular celebrations.
The judges were commanded to fear God (Exodus 18, Deuteronomy 1), instead of relying on their skills of jurisprudence alone.
The laws of the Tabernacle (and later the Holy Temple), and commands to love God and fulfill all of the commandments, were written in the Torah together with (and mixed among) the seemingly mundane laws of restitution, testimony and witnesses (etc.), in order to convey the message that for us it is all part of religion. Secular life was a foreign concept. For example, a shopkeeper would be constantly aware of the religious laws of maintaining honest scales, giving a tithe to the poor (maaser kesafim), not overcharging, returning lost objects left behind, etc.; and he would set aside times for the daily prayers.
The above are just a few examples.
Hebrew (Israelite) society wasn't perfect. We are human; and as seen in the Prophets, there were times of backsliding and various pitfalls. But to the extent that the people kept their national laws and tradition, the society was exemplary and created a model which has influenced the Western world down to today.
See also:
Israelite society (the society in ancient Israel) was based upon the covenant with God, as set forth in the Torah (Exodus ch.19, Deuteronomy 26:16-19). There was always a learned class among the Israelites, and virtually all men and boys (and a good percentage of women) could read and write. A portion of each day was spent praying; and a larger part of the day was spent studying Torah (by a good part of the populace). Religious questions (and torts) were brought to one of the many Rabbis or Jewish courts.
Having a large family was an ideal, as was welcoming guests into the home, giving charity, and many other forms of kindness. A portion of crops was given to the poor. The calendar year was replete with the Sabbaths and festivals; and blessings were said before and after eating and on many other occasions.
Hebrew (Israelite) society wasn't perfect. We are human; and as seen in the Prophets, there were times of backsliding and various pitfalls. But to the extent that the people kept their national laws and tradition, the society was exemplary and created a model which has influenced the Western world down to today.
See also the other Related Links.
it was influenced by judaism
The Bible influenced the three religions of Christianity, Islam and Judaism.
Christianity. Islam was also heavily influenced by Judaism.
What influenced the development of nationalism in Africa?
Christianity and Islam ^^
A country which historically influenced the development of India
The one single event that probably most influenced the early development of Christianity was the decision of Paul to permit gentiles to become Christians without the trauma of circumcision.
According to tradition, Abraham founded what we now call Judaism, 3800 years ago. It was significant because his monotheistic belief made a complete break with the surrounding idolatry. Since then, Judaism has influenced not only other religions, but the Western world as a whole. More information:Which_Hebrew_traditions_have_become_part_of_the_moral_and_ethical_fabric_of_American_society_and_Western_civilizationWhat_did_abraham_and_moses_do_together
Judahism was developed by Abraham
what cultural movement influenced the development of democracy in America?
Judaism has influenced society in various ways such as shaping ethical principles, promoting social justice, and fostering a sense of community. It has had an impact on the development of legal systems, humanitarian efforts, and cultural practices in many societies around the world. Moreover, the emphasis on education and intellectual pursuit within Judaism has contributed to advancements in various fields.
Christianity and Islam.