Spears have historically been recognized as effective weapons and have been used by various civilizations throughout human history. Here are some reasons why spears have been regarded as a good weapon:

1. Versatility: Spears are versatile weapons that can be used for thrusting, slashing, and even throwing. They offer a range of attack options, making them suitable for both close-quarters combat and keeping opponents at a distance.
2. Reach and Range: Spears typically have long shafts, allowing the wielder to attack from a safer distance. This range advantage enables spearmen to strike opponents before they can reach them with their own weapons, giving them an advantage in engagements.
3. Defensive Capabilities: The length of a spear provides an effective means of defense. It can be used to block or parry incoming attacks, keeping enemies at bay and reducing the risk of injury.
4. Ease of Use and Availability: Spears are relatively simple to use and require less specialized training compared to some other weapons. They are relatively easy to manufacture, making them widely available to various military forces and civilizations throughout history.
5. Formation Tactics: Spears are particularly effective in group formations. In ancient warfare, large formations of spearmen, such as phalanxes, were capable of creating an impenetrable wall of spears that could repel enemy cavalry charges or infantry assaults.
6. Cost and Accessibility: Spears are generally more cost-effective and easier to produce than certain other weapons, such as swords or heavy armor. This accessibility made spears a popular choice for many societies, from peasant militias to professional armies.

It's important to note that the effectiveness of any weapon depends on various factors, including the skill of the wielder, tactics employed, and the context of the battle or conflict. Different weapons excel in different scenarios, and the choice of a weapon often depends on the specific requirements and strategies employed by a particular civilization or military force.